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Hell T, Rutz A, Dürr L, Dobrzyński M, Reinhardt JK, Lehner T, Keller M, John A, Gupta M, Pertz O, Hamburger M, Wolfender JL, Garo E. Combining Activity Profiling with Advanced Annotation to Accelerate the Discovery of Natural Products Targeting Oncogenic Signaling in Melanoma. JOURNAL OF NATURAL PRODUCTS 2022; 85:1540-1554. [PMID: 35640148 DOI: 10.1021/acs.jnatprod.2c00146] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The discovery of bioactive natural products remains a time-consuming and challenging task. The ability to link high-confidence metabolite annotations in crude extracts with activity would be highly beneficial to the drug discovery process. To address this challenge, HPLC-based activity profiling and advanced UHPLC-HRMS/MS metabolite profiling for annotation were combined to leverage the information obtained from both approaches on a crude extract scaled down to the submilligram level. This strategy was applied to a subset of an extract library screening aiming to identify natural products inhibiting oncogenic signaling in melanoma. Advanced annotation and data organization enabled the identification of compounds that were likely responsible for the activity in the extracts. These compounds belonged to two different natural product scaffolds, namely, brevipolides from a Hyptis brevipes extract and methoxylated flavonoids identified in three different extracts of Hyptis and Artemisia spp. Targeted isolation of these prioritized compounds led to five brevipolides and seven methoxylated flavonoids. Brevipolide A (1) and 6-methoxytricin (9) were the most potent compounds from each chemical class and displayed AKT activity inhibition with an IC50 of 17.6 ± 1.6 and 4.9 ± 0.2 μM, respectively.
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Affiliation(s)
- Tanja Hell
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Adriano Rutz
- School of Pharmaceutical Sciences, University of Geneva, CMU - Rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU - Rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
| | - Lara Dürr
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Maciej Dobrzyński
- Institute of Cell Biology, University of Bern, Baltzerstrasse 4, 3012 Bern, Switzerland
| | - Jakob K Reinhardt
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Timo Lehner
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Morris Keller
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Anika John
- Institute of Cell Biology, University of Bern, Baltzerstrasse 4, 3012 Bern, Switzerland
| | - Mahabir Gupta
- Center for Pharmacognostic Research and Panamanian Flora, Faculty of Pharmacy, University of Panama, Panama City 0824, Republic of Panama
| | - Olivier Pertz
- Institute of Cell Biology, University of Bern, Baltzerstrasse 4, 3012 Bern, Switzerland
| | - Matthias Hamburger
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences, University of Geneva, CMU - Rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU - Rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
| | - Eliane Garo
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
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Liu Y, Zhao Z, Hu C, Zhao C, Liu J, Du Y. Chiron approach for the total synthesis of brevipolide M. Synlett 2022. [DOI: 10.1055/a-1730-9857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
An efficient stereoselective synthesis of brevipolide M was established in 13 linear steps and 17.8% overall yields base on chiron approach. The key steps of our synthesis involved tandem homologation / tetrahydrofuran cyclization and sequential ring-closing metathesis (RCM) / double-bond migration in one-pot processes.
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Affiliation(s)
- Yang Liu
- Chemistry, RCEES, Beijing, China
| | | | - Chao Hu
- Chemistry, RCEES, Beijing, China
| | | | - Jun Liu
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Centre for Eco-Environmental Sciences, Beijing, China
| | - Yuguo Du
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
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Liu J, Zhao Z, Lv Q, Geng J, Liu Y, Hu C, Du Y. Stereoselective Total Synthesis of (+)-Brevipolide H from d-Galactal. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1700-3520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractAn efficient and concise synthesis of cytotoxic 5,6-dihydro-α-pyrone (+)-brevipolide H has been accomplished in 12 long linear steps in 8.65% overall yield from readily available chiral synthons, d-galactal and ethyl l-lactate. The features of this synthesis are highly diastereoselective Simmons–Smith cyclopropanation and carbohydrate-based chiron approach to rapid access to key 5,6-dihydro-α-pyrone skeleton.
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Affiliation(s)
- Jun Liu
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
- School of Chemical Sciences, University of Chinese Academy of Sciences
| | - Ziyang Zhao
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
- School of Chemical Sciences, University of Chinese Academy of Sciences
| | - Qingwei Lv
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
- School of Chemical Sciences, University of Chinese Academy of Sciences
| | - Jialin Geng
- School of Chemical Sciences, University of Chinese Academy of Sciences
| | - Yang Liu
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
- School of Chemical Sciences, University of Chinese Academy of Sciences
| | - Chao Hu
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
| | - Yuguo Du
- State Key Laboratory of Environmental Chemistry and Eco-Toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science
- School of Chemical Sciences, University of Chinese Academy of Sciences
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Kurniawan YD, Rosyidah A. Strategies for the synthesis of brevipolides. Beilstein J Org Chem 2021; 17:2399-2416. [PMID: 34621402 PMCID: PMC8450957 DOI: 10.3762/bjoc.17.157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/28/2021] [Indexed: 11/23/2022] Open
Abstract
In recent years fifteen 5,6-dihydro-α-pyrone derivatives, bearing either a distinctive cyclopropane or furan ring and named brevipolides A–O (1–15), have been isolated from the invasive plant Hyptis brevipes Poit. Their fascinating structural features, and the potent biological activities, including cytotoxicity against an array of human cancer cell lines and inhibition of the chemokine receptor CCR5, make them attractive synthetic targets. This review article highlights the recent synthetic methodologies and briefly summarizes their biological activities.
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Affiliation(s)
- Yudhi Dwi Kurniawan
- Research Center for Biomaterials, National Research and Innovation Agency, Cibinong, 16911, Indonesia
| | - A'liyatur Rosyidah
- Research Center for Biology, National Research and Innovation Agency, Cibinong, 16911, Indonesia
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Bridi H, de Carvalho Meirelles G, Lino von Poser G. Subtribe Hyptidinae (Lamiaceae): A promising source of bioactive metabolites. JOURNAL OF ETHNOPHARMACOLOGY 2021; 264:113225. [PMID: 32763419 PMCID: PMC7403033 DOI: 10.1016/j.jep.2020.113225] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 06/24/2020] [Accepted: 07/14/2020] [Indexed: 05/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The subtribe Hyptidinae contains approximately 400 accepted species distributed in 19 genera (Hyptis, Eriope, Condea, Cantinoa, Mesosphaerum, Cyanocephalus, Hypenia, Hyptidendron, Oocephalus, Medusantha, Gymneia, Marsypianthes, Leptohyptis, Martianthus, Asterohyptis, Eplingiella, Physominthe, Eriopidion and Rhaphiodon). This is the Lamiaceae clade with the largest number of species in Brazil and high rates of endemism. Some species have been used in different parts of the world mainly as insecticides/pest repellents, wound healing and pain-relief agents, as well as for the treatment of respiratory and gastrointestinal disorders. AIM OF THE REVIEW This review aims to discuss the current status concerning the taxonomy, ethnobotanical uses, phytochemistry and biological properties of species which compose the subtribe Hyptidinae. MATERIALS AND METHODS The available information was collected from scientific databases (ScienceDirect, Pubmed, Web of Science, Scopus, Google Scholar, ChemSpider, SciFinder ACS Publications, Wiley Online Library), as well as other literature sources (e.g. books, theses). RESULTS The phytochemical investigations of plants of this subtribe have led to the identification of almost 300 chemical constituents of different classes such as diterpenes, triterpenes, lignans, α-pyrones, flavonoids, phenolic acids and monoterpenes and sesquiterpenes, as components of essential oils. Extracts, essential oils and isolated compounds showed a series of biological activities such as insecticide/repellent, antimicrobial and antinociceptive, justifying some of the popular uses of the plants. In addition, a very relevant fact is that several species produce podophyllotoxin and related lignans. CONCLUSION Several species of Hyptidinae are used in folk medicine for treating many diseases but only a small fraction of the species has been explored and most of the traditional uses have not been validated by current investigations. In addition, the species of the subtribe appear to be very promising as alternative sources of podophyllotoxin-like lignans which are the lead compounds for the semi-synthesis of teniposide and etoposide, important antineoplastic agents. Thus, there is a wide-open door for future studies, both to support the popular uses of the plants and to find new biologically active compounds in this large number of species not yet explored.
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Affiliation(s)
- Henrique Bridi
- Universidade Federal Do Rio Grande Do Sul, Programa de Pós-Graduação Em Ciências Farmacêuticas, Avenida Ipiranga 2752, Porto Alegre, Brazil
| | - Gabriela de Carvalho Meirelles
- Universidade Federal Do Rio Grande Do Sul, Programa de Pós-Graduação Em Ciências Farmacêuticas, Avenida Ipiranga 2752, Porto Alegre, Brazil
| | - Gilsane Lino von Poser
- Universidade Federal Do Rio Grande Do Sul, Programa de Pós-Graduação Em Ciências Farmacêuticas, Avenida Ipiranga 2752, Porto Alegre, Brazil.
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Physicochemical analysis of multilayer adsorption mechanism of anionic dyes on lignocellulosic biomasses via statistical physics and density functional theory. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114511] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Martínez-Fructuoso L, Pereda-Miranda R, Fragoso-Serrano M, da Silva AS, Leitão SG. Dihydro-furanones from Hyptis species: Chemical correlations and DFT-NMR/ECD calculations for stereochemical assignments. PHYTOCHEMISTRY 2020; 179:112481. [PMID: 33017733 DOI: 10.1016/j.phytochem.2020.112481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
Dihydro-furanones are bioactive compounds isolated from various plants, marine fungi, and sponges. The present investigation describes the isolation by recycling HPLC and structural characterization by NMR of four previously undescribed 2(5H)-furanones, monticofuranolide A and pectinolides N-P, one phenylpropanoid, rosmarinic acid, and five known flavonoids, in addition to the undescribed natural flavonoid, 2R,3R-dihydrogossipetin or 5,7,8,3',4'-pentahydroxy flavanonol, from collections of H. monticola Mart. ex Benth and Hyptis pectinata (L.) Poit. Chemical correlations, resembling the biogenetic relationship of the isolated 2(5H)-furanones with their 5,6-dihydro-2H-pyran-2-one precursors, were accomplished to confirm their absolute configuration. Density functional theory-NMR/ECD calculations have been used to solve the absolute configuration for this type of compounds.
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Affiliation(s)
- Lucero Martínez-Fructuoso
- Departamento de Farmacia, Facultad de Química and Programa de Maestría y Doctorado en Ciencias Químicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Rogelio Pereda-Miranda
- Departamento de Farmacia, Facultad de Química and Programa de Maestría y Doctorado en Ciencias Químicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510, Mexico.
| | - Mabel Fragoso-Serrano
- Departamento de Farmacia, Facultad de Química and Programa de Maestría y Doctorado en Ciencias Químicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Aline Soares da Silva
- Faculdade de Farmacia, Universidade Federal do Rio de Janeiro, CCS, Bloco A, Ilha do Fundão, 21941-902, Rio de Janeiro, Brazil
| | - Suzana Guimarães Leitão
- Faculdade de Farmacia, Universidade Federal do Rio de Janeiro, CCS, Bloco A, Ilha do Fundão, 21941-902, Rio de Janeiro, Brazil
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The (+)-Brevipolide H Displays Anticancer Activity against Human Castration-Resistant Prostate Cancer: The Role of Oxidative Stress and Akt/mTOR/p70S6K-Dependent Pathways in G1 Checkpoint Arrest and Apoptosis. Molecules 2020; 25:molecules25122929. [PMID: 32630532 PMCID: PMC7355498 DOI: 10.3390/molecules25122929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/20/2020] [Accepted: 06/22/2020] [Indexed: 02/07/2023] Open
Abstract
Because conventional chemotherapy is not sufficiently effective against prostate cancer, various examinations have been performed to identify anticancer activity of naturally occurring components and their mechanisms of action. The (+)-brevipolide H, an α-pyrone-based natural compound, induced potent and long-term anticancer effects in human castration-resistant prostate cancer (CRPC) PC-3 cells. Flow cytofluorometric analysis with propidium iodide staining showed (+)-brevipolide H-induced G1 arrest of cell cycle and subsequent apoptosis through induction of caspase cascades. Since Akt/mTOR pathway has been well substantiated in participating in cell cycle progression in G1 phase, its signaling and downstream regulators were examined. Consequently, (+)-brevipolide H inhibited the signaling pathway of Akt/mTOR/p70S6K. The c-Myc inhibition and downregulation of G1 phase cyclins were also attributed to (+)-brevipolide H action. Overexpression of myristoylated Akt significantly rescued mTOR/p70S6K and downstream signaling under (+)-brevipolide H treatment. ROS and Ca2+, two key mediators in regulating intracellular signaling, were determined, showing that (+)-brevipolide H interactively induced ROS production and an increase of intracellular Ca2+ levels. The (+)-Brevipolide H also induced the downregulation of anti-apoptotic Bcl-2 family proteins (Bcl-2 and Bcl-xL) and loss of mitochondrial membrane potential, indicating the contribution of mitochondrial dysfunction to apoptosis. In conclusion, the data suggest that (+)-brevipolide H displays anticancer activity through crosstalk between ROS production and intracellular Ca2+ mobilization. In addition, suppression of Akt/mTOR/p70S6K pathway associated with downregulation of G1 phase cyclins contributes to (+)-brevipolide H-mediated anticancer activity, which ultimately causes mitochondrial dysfunction and cell apoptosis. The data also support the biological significance and, possibly, clinically important development of natural product-based anticancer approaches.
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Ochi R, Nishiwaki H, Yamauchi S. Syntheses and Phytotoxicity of All Stereoisomers of 6-(2-Hydroxy-6-phenylhex-1-yl)-5,6-dihydro-2 H-pyran-2-one and Determination of the Effect of the α,β-Unsaturated Carbonyl Structure and Hydroxy Group Bonding to Chiral Carbon. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12558-12564. [PMID: 31609622 DOI: 10.1021/acs.jafc.9b05507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
All four stereoisomers of naturally occurring 6-(2-hydroxy-6-phenylhex-1-yl)-5,6-dihydro-2H-pyran-2-one (1) were synthesized by employing yeast-reduction products with high optical purity [from 95% enantiomeric excess (ee) to more than 99% ee], and then their phytotoxicities against lettuce and Italian ryegrass were evaluated. In the Italian ryegrass seedlings test, (6S,2'R)-1 showed the most potent and stereospecific activity against the shoots (IC50 = 260 μM) and roots (IC50 = 43.2 μM), with a significant difference from other stereoisomers. The highest seed germination inhibitory activity against Italian ryegrass seed was also observed in (6S,2'R)-1, showing a 53% germination ratio from the control at 1000 μM. This advantageous (6S,2'R) stereochemistry was employed in the syntheses of α,β-dihydro, 2'-dehydroxy, and 2'-methoxy derivatives 13-15. By the test using these derivatives, the importance of the α,β-unsaturated double bond and hydroxy group bonding to a chiral center on the 6-alkyl chain of 5,6-dihydro-α-pyrone for phytotoxicity was determined. In the test against lettuce, the 6S configuration and (6S,2'S) configuration were necessary for growth inhibition (IC50 = ca. 60 μM) and germination inhibition (63% germination ratio at 1000 μM), respectively.
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Affiliation(s)
- Ryota Ochi
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Hisashi Nishiwaki
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
| | - Satoshi Yamauchi
- Graduate School of Agriculture , Ehime University , 3-5-7 Tarumi , Matsuyama , Ehime 790-8566 , Japan
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Navarro-Santos P, Rodriguez-Olalde NE, Gallo M, Vargas R, Garza J, López-Albarrán P. On the initial stages of lignin polymerization through spin-polarized density functional theory. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.05.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Limachi I, Condo C, Palma C, Nina N, Salamanca E, Ticona JC, Udaeta E, Flores N, Serato A, Marupa N, Chao B, Ibaguari G, Nay C, Manner S, Sterner O, Giménez A. Antiparasitic Metabolites from Hyptis brevipes, a Tacana Medicinal Plant. Nat Prod Commun 2019. [DOI: 10.1177/1934578x1901400115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A bioassay screening against protozoa parasites of several Tacana medicinal plants gave Hyptis brevipes (Id'ene eidhue), traditionally used as decoction for intestinal parasites, as the most active extract. In this work we did a bioguided isolation of active constituents found in leaves. Structure elucidation was carried out by NMR spectroscopy and MS spectrometry analyses. Active constituents showed differentiated activity towards Giardia lamblia, Trypanosoma cruzi, several Leishmania strains, Plasmodium falciparum and cytotoxicity against HeLa cells. Brevipolide H (1) was the less cytotoxic and best antiparasitic, while the catechol derivative (2) the most active and cytotoxic.
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Affiliation(s)
- Ivan Limachi
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
- Center for Analysis and Synthesis, Lund University, Naturvetarvägen 14, SE-22100 Lund, Sweden
| | - Claudia Condo
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Camila Palma
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Nelida Nina
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Efrain Salamanca
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Juan C. Ticona
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Enrique Udaeta
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | - Ninoska Flores
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
| | | | | | - Benigno Chao
- Buena Vista Community, Prov. Abel Iturralde, Bolivia
| | - Gladys Ibaguari
- Consejo Indígena de Mujeres Tacana (CIMTA), Tumupasa, Prov. Abel Iturralde, Bolivia
| | - Constantino Nay
- Consejo Indígena de los Pueblos Tacana (CIPTA), Tumupasa, Prov. Abel Iturralde, Bolivia
| | - Soffie Manner
- Center for Analysis and Synthesis, Lund University, Naturvetarvägen 14, SE-22100 Lund, Sweden
| | - Olov Sterner
- Center for Analysis and Synthesis, Lund University, Naturvetarvägen 14, SE-22100 Lund, Sweden
| | - Alberto Giménez
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, Av. Saavedra 2224, Mirafllores, La Paz, Bolivia
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Shiva Raju K, Sabitha G. First stereoselective total synthesis of brevipolide M. Org Biomol Chem 2018; 15:6393-6400. [PMID: 28730192 DOI: 10.1039/c7ob01438d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first stereoselective total synthesis of a cytotoxic brevipolide M, which shares a pyrone framework bearing a tetrahydrofuran moiety and a cinnamate group with the readily available (-)-DET, is described. The key steps involved in the synthesis are the epoxide-opening, Brown's allylation, and the RCM reaction to install an α,β-unsaturated lactone ring and the inversion of the C-6' stereogenic hydroxyl group using the Mitsunobu reaction.
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Affiliation(s)
- Kasa Shiva Raju
- Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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13
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Abstract
The enantioselective synthesis of natural brevipolide H is reported for the first time. By way of Sharpless epoxidation of penta-1,4-dien-3-ol, both enantiomerically pure epoxides were converted to the corresponding olefins for cross metathesis. Subsequent transformations, including epoxide ring opening, esterifications, cyclopropanation, oxidation and ring-closing metathesis, provided the target molecule. This synthesis successfully addresses previous shortcomings in preparing brevipolides.
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Affiliation(s)
- Ching-Nung Chen
- Department of Chemistry, National Central University, No. 300 Jhong-Da Rd., Jhong-li, Taoyuan 32001, Taiwan.
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, No. 300 Jhong-Da Rd., Jhong-li, Taoyuan 32001, Taiwan.
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Suárez-Ortiz GA, Cerda-García-Rojas CM, Fragoso-Serrano M, Pereda-Miranda R. Complementarity of DFT Calculations, NMR Anisotropy, and ECD for the Configurational Analysis of Brevipolides K-O from Hyptis brevipes. JOURNAL OF NATURAL PRODUCTS 2017; 80:181-189. [PMID: 28099005 DOI: 10.1021/acs.jnatprod.6b00953] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Brevipolides K-O (1-5), five new cytotoxic 6-(6'-cinnamoyloxy-2',5'-epoxy-1'-hydroxyheptyl)-5,6-dihydro-2H-pyran-2-ones (IC50 values against six cancer cell lines, 1.7-10 μM), were purified by recycling HPLC from Hyptis brevipes. The structures, containing a distinctive tetrahydrofuran ring, were established by comprehensive quantum mechanical calculations and experimental spectroscopic analysis of their NMR and ECD data. Detailed analysis of the experimental NMR 1H-1H vicinal coupling constants in comparison with the corresponding DFT-calculated values at the B3LYP/DGDZVP level confirmed the absolute configuration of 3 and revealed its conformational preferences, which were further strengthened by NOESY correlations. NMR anisotropy experiments by the application of Mosher's ester methodology and chemical correlations were also used to conclude that this novel brevipolide series (1-5) share the same absolute configuration corresponding to C-6(R), C-1'(S), C-2'(R), C-5'(S), and C-6'(S).
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Affiliation(s)
- G Alejandra Suárez-Ortiz
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria , Mexico City 04510, Mexico
| | - Carlos M Cerda-García-Rojas
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional , A. P. 14-740, Mexico City 07000, Mexico
| | - Mabel Fragoso-Serrano
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria , Mexico City 04510, Mexico
| | - Rogelio Pereda-Miranda
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior Ciudad Universitaria , Mexico City 04510, Mexico
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Xu JW, Ji PY, Liu YF, Luo WP, Liu Q, Guo CC. Copper(I)-Catalyzed α-Acryloyloxylation of Ketones with α,β-Unsaturated Carboxylic Acids To Form α-Acryloyloxy Ketones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jing-Wen Xu
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
| | - Peng-Yi Ji
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
| | - Yu-Feng Liu
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
| | - Wei-Ping Luo
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
| | - Qiang Liu
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
| | - Can-Cheng Guo
- College of Chemistry and Chemical Engineering; Advanced Catalytic Engineering Research Center of the Ministry of Education; Hunan University; 410082 Changsha China
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Li Y, Tian R, Du S. Mechanisms and stereoselectivities of the DABCO-catalyzed Rauhut–Currier reaction of α,β-unsaturated ketones and aryl acrylates: a computational investigation. RSC Adv 2017. [DOI: 10.1039/c6ra25311c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Mechanism of the RC reaction in the absence and presence of PhOH.
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Affiliation(s)
- Yan Li
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- China
| | - Ruixue Tian
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- China
| | - Shiwen Du
- School of Petroleum and Chemical Engineering
- Dalian University of Technology
- Panjin
- China
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Chen M, Zhao Q, Hao JD, Wang CY. Two benzaldehyde derivatives and their artefacts from a gorgonian-derived Eurotium sp. fungus. Nat Prod Res 2016; 31:268-274. [PMID: 27627699 DOI: 10.1080/14786419.2016.1230116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Two new benzaldehyde derivatives, named 3'-OH-tetrahydroauroglaucin (1) and(3'S*,4'R*)-6-(3',5-epoxy-4'-hydroxy-1'-heptenyl)-2-hydroxy-3-(3''-methyl-2''-butenyl)benzaldehyde (2), were isolated from a gorgonian-derived Eurotium sp. fungus. Their structures were determined by extensive spectroscopic analysis including NMR and MS spectra. Dissolved 1 in CDCl3 for several days could be detected its 2H-chromene skeleton derivatives (1a/1b), a pair of enantiomers with opposite configurations at C-3'. Compound 2 was also found to chemically convert to a pair of epimers non-enzymatically. The plausible mechanism to form the 2H-chromene artefacts with racemisation at C-3' undergoing nucleophilic substitution (SN1) was proposed.
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Affiliation(s)
- Min Chen
- a Marine Science & Technology Institute, College of Environmental Science & Engineering , Yangzhou University , Yangzhou , People's Republic of China.,b Key Laboratory of Marine Drugs, the Ministry of Education , School of Medicine and Pharmacy, Ocean University of China , Qingdao , People's Republic of China
| | - Qing Zhao
- b Key Laboratory of Marine Drugs, the Ministry of Education , School of Medicine and Pharmacy, Ocean University of China , Qingdao , People's Republic of China.,c Laboratory for Marine Drugs and Bioproducts , Qingdao National Laboratory for Marine Science and Technology , Qingdao , People's Republic of China
| | - Jun-Di Hao
- b Key Laboratory of Marine Drugs, the Ministry of Education , School of Medicine and Pharmacy, Ocean University of China , Qingdao , People's Republic of China.,c Laboratory for Marine Drugs and Bioproducts , Qingdao National Laboratory for Marine Science and Technology , Qingdao , People's Republic of China
| | - Chang-Yun Wang
- b Key Laboratory of Marine Drugs, the Ministry of Education , School of Medicine and Pharmacy, Ocean University of China , Qingdao , People's Republic of China.,c Laboratory for Marine Drugs and Bioproducts , Qingdao National Laboratory for Marine Science and Technology , Qingdao , People's Republic of China
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Wei W, Wu XW, Deng GG, Yang XW. Anti-inflammatory coumarins with short- and long-chain hydrophobic groups from roots of Angelica dahurica cv. Hangbaizhi. PHYTOCHEMISTRY 2016; 123:58-68. [PMID: 26775737 DOI: 10.1016/j.phytochem.2016.01.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 01/01/2016] [Accepted: 01/07/2016] [Indexed: 06/05/2023]
Abstract
The (1)H NMR-guided fractionation of a cyclohexane soluble portion of the 75% ethanolic extract of the roots of Angelica dahurica cv. Hangbaizhi led to the isolation of two coumarins, namely, 5-(3"-hydroxy-3"-methylbutyl)-8-hydroxyfuranocoumarin, and isobyakangelicin hydrate-3"-ethyl ether, and ten coumarins with short- or long-chain hydrophobic groups, namely, andafocoumarins A-J. Their structures were elucidated by extensive spectroscopic analyses. The absolute configurations of the C-2" secondary alcohols in ten of these compounds were deduced via the circular dichroism data of the in situ formed [Rh2(OCOCF3)4] complex, and oxidation reactions were utilized to determine location of the double bonds in the lipid chain of andafocoumarins H and I, respectively. The long-chain hydrophobic group of andafocoumarin J was determined by the method of chemical degradation and GC-MS analysis. It was the first time that coumarins with short- or long-chain hydrophobic groups in this plant had been comprehensively investigated. All isolates were assayed for their inhibitory effect against nitric oxide (NO) production in a lipopolysaccharide (LPS)-activated RAW264.7 macrophage cell line, among which andafocoumarins A and B exhibited a potent inhibition on LPS-activated NO production with IC50 values of 19.7 and 13.9 μM, respectively, indicating their stronger inhibitory activity than l-N(6)-(1-iminoethyl)-lysine (IC50=23.7 μM), a selective inhibitor of inducible nitric oxide synthase.
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Affiliation(s)
- Wei Wei
- State Key Laboratory of Natural and Biomimetic Drugs (Peking University), Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Peking University, Beijing 100191, PR China
| | - Xiu-Wen Wu
- State Key Laboratory of Natural and Biomimetic Drugs (Peking University), Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Peking University, Beijing 100191, PR China
| | - Gai-Gai Deng
- State Key Laboratory of Natural and Biomimetic Drugs (Peking University), Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Peking University, Beijing 100191, PR China
| | - Xiu-Wei Yang
- State Key Laboratory of Natural and Biomimetic Drugs (Peking University), Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Peking University, Beijing 100191, PR China.
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20
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Juárez-González F, Suárez-Ortiz GA, Fragoso-Serrano M, Cerda-García-Rojas CM, Pereda-Miranda R. DFT 1H-1H coupling constants in the conformational analysis and stereoisomeric differentiation of 6-heptenyl-2H-pyran-2-ones: configurational reassignment of synargentolide A. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:203-212. [PMID: 25353378 DOI: 10.1002/mrc.4178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 10/05/2014] [Accepted: 10/08/2014] [Indexed: 06/04/2023]
Abstract
Density functional theory (DFT) (1) H-(1) H NMR coupling constant calculations, including solvation parameters with the polarizable continuum model B3LYP/DGDZVP basis set together with the experimental values measured by spectral simulation, were used to predict the configuration of hydroxylated 6-heptenyl-5,6-dihydro-2H-pyran-2-ones 1, 2, 4, and 7, allowing epimer differentiation. Modeling of these flexible compounds requires the inclusion of solvation models that account for stabilizing interactions derived from intramolecular and intermolecular hydrogen bonds, in contrast with peracetylated derivatives (3, 5, and 6) in which the solvation consideration can be omitted. Using this DFT NMR integrated approach as well as spectral simulation, the configurational reassignment of synargentolide A (8) was accomplished by calculations in the gas phase among four possible diastereoisomers (8-11). Calculated (3) JH,H values established its configuration as 6R-[4'S,5'S,6'S-(triacetyloxy)-2E-heptenyl]-5,6-dihydro-2H-pyran-2-one (8), in contrast with the incorrect 6R,4'R,5'R,6'R-diastereoisomer previously proposed by synthesis (12). Application of this approach increases the probability for successful enantiospecific total syntheses of flexible compounds with multiple chiral centers.
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Affiliation(s)
- Francisco Juárez-González
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510, DF, Mexico
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Lin JW, Kurniawan YD, Chang WJ, Leu WJ, Chan SH, Hou DR. Asymmetric Synthesis of (−)-Brevipolide H through Cyclopropanation of the α,β-Unsaturated Ketone. Org Lett 2014; 16:5328-31. [DOI: 10.1021/ol502507k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jing-Wen Lin
- Department
of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Yudhi Dwi Kurniawan
- Department
of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Wen-Jung Chang
- Department
of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Wohn-Jenn Leu
- School
of Pharmacy, National Taiwan University, No. 33, Linsen South Road, Taipei, Taiwan 10050
| | - She-Hung Chan
- School
of Pharmacy, National Taiwan University, No. 33, Linsen South Road, Taipei, Taiwan 10050
| | - Duen-Ren Hou
- Department
of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
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Shi T, Luo Y, Wang XL, Lu S, Zhao YL, Zhang J. Theoretical Studies on the Mechanism, Enantioselectivity, and Axial Ligand Effect of a Ru(salen)-Catalyzed Asymmetric Cyclopropanation Reaction. Organometallics 2014. [DOI: 10.1021/om400956z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ting Shi
- State Key Laboratory of Microbial Metabolism, School of
Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
- Department of Pathophysiology, Key Laboratory
of Cell Differentiation and Apoptosis of Chinese Ministry of Education,
School of Medicine, Shanghai Jiao Tong University, 280 Chongqing Road, Shanghai 200025, People’s Republic of China
| | - Yu Luo
- Department of Pathophysiology, Key Laboratory
of Cell Differentiation and Apoptosis of Chinese Ministry of Education,
School of Medicine, Shanghai Jiao Tong University, 280 Chongqing Road, Shanghai 200025, People’s Republic of China
| | - Xiao-Lei Wang
- State Key Laboratory of Microbial Metabolism, School of
Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
| | - Shaoyong Lu
- Department of Pathophysiology, Key Laboratory
of Cell Differentiation and Apoptosis of Chinese Ministry of Education,
School of Medicine, Shanghai Jiao Tong University, 280 Chongqing Road, Shanghai 200025, People’s Republic of China
| | - Yi-Lei Zhao
- State Key Laboratory of Microbial Metabolism, School of
Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
| | - Jian Zhang
- Department of Pathophysiology, Key Laboratory
of Cell Differentiation and Apoptosis of Chinese Ministry of Education,
School of Medicine, Shanghai Jiao Tong University, 280 Chongqing Road, Shanghai 200025, People’s Republic of China
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Kumaraswamy G, Jayaprakash N, Rambabu D, Ganguly A, Banerjee R. Towards the diastereoselective synthesis of derivative of 11′-epi-brevipolide H. Org Biomol Chem 2014; 12:1793-803. [DOI: 10.1039/c3ob42367k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Liu W, Zhao G. DABCO catalyzed cross-Rauhut-Currier/transesterification reactions of activated alkenes with phenyl acrylates: scope and mechanistic insight. Org Biomol Chem 2013; 12:832-5. [PMID: 24326624 DOI: 10.1039/c3ob41763h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DABCO catalyzed the cross-Rauhut-Currier/transesterification reaction of α-cyano-α,β-unsaturated ketones and aryl acrylates was discovered. The reaction rate law was determined by an integral method under pseudo-first-order reaction conditions, which assisted in proposing the mechanism of cross-Rauhut-Currier reaction promoted by Brønsted acid and establishing the rate-determining step.
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Affiliation(s)
- Wen Liu
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.
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