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Beč A, Zlatić K, Banjanac M, Radovanović V, Starčević K, Kralj M, Hranjec M. Design, Synthesis and Biological Activity of Novel Methoxy- and Hydroxy-Substituted N-Benzimidazole-Derived Carboxamides. Molecules 2024; 29:2138. [PMID: 38731629 PMCID: PMC11085308 DOI: 10.3390/molecules29092138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
This work presents the design, synthesis and biological activity of novel N-substituted benzimidazole carboxamides bearing either a variable number of methoxy and/or hydroxy groups. The targeted carboxamides were designed to investigate the influence of the number of methoxy and/or hydroxy groups, the type of substituent placed on the N atom of the benzimidazole core and the type of substituent placed on the benzimidazole core on biological activity. The most promising derivatives with pronounced antiproliferative activity proved to be N-methyl-substituted derivatives with hydroxyl and methoxy groups at the phenyl ring and cyano groups on the benzimidazole nuclei with selective activity against the MCF-7 cell line (IC50 = 3.1 μM). In addition, the cyano-substituted derivatives 10 and 11 showed strong antiproliferative activity against the tested cells (IC50 = 1.2-5.3 μM). Several tested compounds showed significantly improved antioxidative activity in all three methods compared to standard BHT. In addition, the antioxidative activity of 9, 10, 32 and 36 in the cells generally confirmed their antioxidant ability demonstrated in vitro. However, their antiproliferative activity was not related to their ability to inhibit oxidative stress nor to their ability to induce it. Compound 8 with two hydroxy and one methoxy group on the phenyl ring showed the strongest antibacterial activity against the Gram-positive strain E. faecalis (MIC = 8 μM).
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Affiliation(s)
- Anja Beč
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, 10000 Zagreb, Croatia;
| | - Katarina Zlatić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia; (K.Z.); (M.K.)
| | - Mihailo Banjanac
- Pharmacology In Vitro, Selvita Ltd., Prilaz baruna Filipovića 29, 10000 Zagreb, Croatia; (M.B.); (V.R.)
| | - Vedrana Radovanović
- Pharmacology In Vitro, Selvita Ltd., Prilaz baruna Filipovića 29, 10000 Zagreb, Croatia; (M.B.); (V.R.)
| | - Kristina Starčević
- Department of Chemistry and Biochemistry, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia;
| | - Marijeta Kralj
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia; (K.Z.); (M.K.)
| | - Marijana Hranjec
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, 10000 Zagreb, Croatia;
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Manjappa KB, Fan SC, Yang DY. Structural tuning of β-enamino diketones: exploration of solution and crystalline state photochromism. Front Chem 2023; 11:1295347. [PMID: 38025049 PMCID: PMC10661371 DOI: 10.3389/fchem.2023.1295347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023] Open
Abstract
A library of β-enamino diketones was prepared via base-mediated, three-component reaction of 4-hydroxycoumarins with various aromatic/aliphatic amines and β-nitrostyrenes under microwave irradiation conditions to investigate their photochemical properties. Among the prepared compounds, a thiophene derived β-enamino diketone was found to be light-sensitive and to exhibit unique photochromic behavior, that is, positive photochromism in solution and negative photochromism in crystalline phase. In addition, this prepared photochromic compound was further covalently linked to a structure-related, piezochromic β-enamino diketone moiety to explore its potential multi-stimuli responsive properties.
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Affiliation(s)
- Kiran B. Manjappa
- Graduate Program for Biomedical and Materials Science, Tunghai University, Taichung, Taiwan
| | - Sheng-Chieh Fan
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Ding-Yah Yang
- Graduate Program for Biomedical and Materials Science, Tunghai University, Taichung, Taiwan
- Department of Chemistry, Tunghai University, Taichung, Taiwan
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Li L, Liu Y, Zhou S, Li J, Qi C, Zhang F. Synthesis of 4-hydroxy-3-benzoylpyridin-2(1 H)-one derivatives using pyrrolidine as catalyst. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2177872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- Linbo Li
- School of Pharmacy, Jiamusi University, Jiamusi, China
| | - Yuxiao Liu
- School of Pharmacy, Jiamusi University, Jiamusi, China
| | - Shujing Zhou
- School of Pharmacy, Jiamusi University, Jiamusi, China
| | - Jinjing Li
- School of Pharmacy, Jiamusi University, Jiamusi, China
| | - Chenze Qi
- School of Pharmacy, Jiamusi University, Jiamusi, China
- School of Chemistry and Chemical Engineering, Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing, China
| | - Furen Zhang
- School of Chemistry and Chemical Engineering, Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing, China
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Pundi A, Chang CJ, Chen J, Hsieh SR, Lee MC. A dimedone-phenylalanine-based fluorescent sensor for the detection of iron (III), copper (II), L-cysteine, and L-tryptophan in solution and pharmaceutical samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 274:121108. [PMID: 35272123 DOI: 10.1016/j.saa.2022.121108] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
The development of fluorescence molecules for the fast and effective detection of L-tryptophan (L-Trp) has attracted a lot of attention because it is an important amino acid for baby growth, nitrogen equilibrium in adults, improving sleep, and mood regulation. A dimedone-phenylalanine-based chiral sensor (SDPA) was synthesized and exhibited a strong fluorescence quenching by Fe3+ and Cu2+ in a water/DMSO (3/7) solution with a detection limit of 2.29 × 10-6 M and 6.37 × 10-6 M, respectively. The factors affecting fluorescence sensings, such as the pH and competing cations, were studied. The sensor can be reused at least five times after being treated with EDTA. The Job plot, ESI-MS spectra, 1H NMR spectra, absorbance, and fluorescence titration experiments were investigated to study the mechanism of SDPA-Fe3+ and SDPA-Cu2+ complexation. The SDPA-Cu2+ complex can detect L-tryptophan and L-cysteine at trace levels by turn-on fluorescence with a detection limit of 9.35 × 10-6 M and 8.86 × 10-6 M, respectively. Moreover, applying the SDPA-Cu2+ complex for quantitative analysis of L-tryptophan in real sleep-improving capsules resulted in good recovery. The L-tryptophan level of the Elining capsule was determined at 190.8 ± 10.5 mg/g (mg L-tryptophan/g medicine), which is close to the announced quantity of 180 mg/g. Besides, the SDPA-Cu2+ complex can selectively detect free L-Try molecules and L-Try residues in proteins.
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Affiliation(s)
- Arul Pundi
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan ROC
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan ROC.
| | - Jemkun Chen
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, 43, Sec.4, Keelung Rd, Taipei 106, Taiwan, ROC
| | - Shih-Rong Hsieh
- Cardiovascular Center, Taichung Tzu Chi Hospital, 88, Sec. 1, Fengxing Road, Tanzi, Taichung 427, Taiwan, ROC
| | - Ming-Ching Lee
- Department of Surgery, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Section 4, Taichung 40705, Taiwan, ROC
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Jacobsen MT, Spaltenstein P, Giesler RJ, Chou DHC, Kay MS. Improved Handling of Peptide Segments Using Side Chain-Based "Helping Hand" Solubilizing Tools. Methods Mol Biol 2022; 2530:81-107. [PMID: 35761044 DOI: 10.1007/978-1-0716-2489-0_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Maintaining high, or even sufficient, solubility of every peptide segment in chemical protein synthesis (CPS) remains a critical challenge; insolubility of just a single peptide segment can thwart a total synthesis venture. Multiple approaches have been used to address this challenge, most commonly by employing a chemical tool to temporarily improve peptide solubility. In this chapter, we discuss chemical tools for introducing semipermanent solubilizing sequences (termed helping hands) at the side chains of Lys and Glu residues. We describe the synthesis, incorporation by Fmoc-SPPS, and cleavage conditions for utilizing these two tools. For Lys sites, we discuss the Fmoc-Ddap-OH dimedone-based linker, which is achiral, synthesized in one step, can be introduced directly at primary amines, and is removed using hydroxylamine (or hydrazine). For Glu sites, we detail the new Fmoc-SPPS building block, Fmoc-Glu(AlHx)-OH, which can be prepared in an efficient process over two purifications. Solubilizing sequences are introduced directly on-resin and later cleaved with palladium-catalyzed transfer under aqueous conditions to restore a native Glu side chain. These two chemical tools are straightforward to prepare and implement, and we anticipate continued usage in "difficult" peptide segments following the protocols described herein.
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Affiliation(s)
- Michael T Jacobsen
- Division of Diabetes and Endocrinology, Department of Pediatrics, Stanford University, Palo Alto, CA, USA
| | - Paul Spaltenstein
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Riley J Giesler
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Danny Hung-Chieh Chou
- Division of Diabetes and Endocrinology, Department of Pediatrics, Stanford University, Palo Alto, CA, USA
| | - Michael S Kay
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA.
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Yamamoto T, Chang TC, Tanaka K. Epoc group: transformable protecting group with gold(iii)-catalyzed fluorene formation. Chem Sci 2021; 12:10703-10709. [PMID: 34476055 PMCID: PMC8372321 DOI: 10.1039/d1sc03125b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 07/08/2021] [Indexed: 11/21/2022] Open
Abstract
This study presents the novel concept of a transformable protecting group, which changes its properties through structural transformation. Based on this concept, we developed a 2-(2-ethynylphenyl)-2-(5-methylfuran-2-yl)-ethoxycarbonyl (Epoc) group. The Epoc group was transformed into an Fmoc-like structure with gold(iii)-catalyzed fluorene formation and was removable under Fmoc-like mild basic conditions post-transformation even though it was originally stable under strongly basic conditions. As an application for organic synthesis, the Epoc group provides the novel orthogonality of gold(iii)-labile protecting groups in solid-phase peptide synthesis. In addition, the high turnover number of fluorene formation in aqueous media is suggestive of the applicability of the Epoc group to biological systems. A protecting group removable with gold(iii)-catalyzed fluorene formation and the subsequent addition of piperidine was developed.![]()
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Affiliation(s)
- Tomoya Yamamoto
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research 2-1 Hirosawa, Wako-shi Saitama 351-0198 Japan
| | - Tsung-Che Chang
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research 2-1 Hirosawa, Wako-shi Saitama 351-0198 Japan
| | - Katsunori Tanaka
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research 2-1 Hirosawa, Wako-shi Saitama 351-0198 Japan .,Department of Chemical Science and Engineering, School of Materials and Chemical Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8552 Japan.,Biofunctional Chemistry Laboratory, Alexander Butlerov Institute of Chemistry, Kazan Federal University 18 Kremlyovskaya Street 420008 Kazan Russian Federation
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Cui T, Chen J, Zhao R, Guo Y, Tang J, Li Y, Li Y, Bierer D, Liu L. Use of a Removable Backbone Modification Strategy to Prevent Aspartimide Formation in the Synthesis of Asp Lactam Cyclic Peptides
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tingting Cui
- School of Food and Biological Engineering, Engineering Research Center of Bio‐process, Ministry of Education Hefei University of Technology Hefei Anhui 230009 China
| | - Junyou Chen
- School of Food and Biological Engineering, Engineering Research Center of Bio‐process, Ministry of Education Hefei University of Technology Hefei Anhui 230009 China
| | - Rui Zhao
- Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yanyan Guo
- School of Food and Biological Engineering, Engineering Research Center of Bio‐process, Ministry of Education Hefei University of Technology Hefei Anhui 230009 China
| | - Jiahui Tang
- School of Food and Biological Engineering, Engineering Research Center of Bio‐process, Ministry of Education Hefei University of Technology Hefei Anhui 230009 China
| | - Yulei Li
- Tsinghua‐Peking Center for Life Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Center for Synthetic and Systems Biology, Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yi‐Ming Li
- School of Food and Biological Engineering, Engineering Research Center of Bio‐process, Ministry of Education Hefei University of Technology Hefei Anhui 230009 China
| | - Donald Bierer
- Department of Medicinal Chemistry, Bayer AG, Aprather Weg 18A, 42096 Wuppertal Germany
| | - Lei Liu
- Tsinghua‐Peking Center for Life Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Center for Synthetic and Systems Biology, Department of Chemistry Tsinghua University Beijing 100084 China
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Ramkisson S, Al‐Rasheed HH, Dahlous KA, De La Torre BG, El‐Faham A, Albericio F. Scope and Limitations of Barbituric and Thiobarbituric Amino Acid Derivatives as Protecting Groups for Solid‐Phase Peptide Synthesis: Towards a Green Protecting Group. ChemistrySelect 2021. [DOI: 10.1002/slct.202101539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shaveer Ramkisson
- Peptide Science Laboratory School of Chemistry and Physics University of KwaZulu-Natal Durban 4000 South Africa
| | - Hessa H. Al‐Rasheed
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Kholood A. Dahlous
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Beatriz G. De La Torre
- Peptide Science Laboratory School of Chemistry and Physics University of KwaZulu-Natal Durban 4000 South Africa
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP) School of Laboratory Medicine and Medical Sciences College of Health Sciences University of KwaZulu-Natal Durban 4000 South Africa
| | - Ayman El‐Faham
- Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia
- Chemistry Department Faculty of Science Alexandria University, P.O. Box 426, Ibrahimia Alexandria 12321 Egypt
| | - Fernando Albericio
- Peptide Science Laboratory School of Chemistry and Physics University of KwaZulu-Natal Durban 4000 South Africa
- CIBER-BBN Networking Centre on Bioengineering Biomaterials and Nanomedicine and Department of Organic Chemistry University of Barcelona 08028 Barcelona Spain
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) 08034 Barcelona Spain
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Chen J, Cui T, Sun S, Guo Y, Chen J, Wang J, Bierer D, Li YM. Application of tert-Butyl Disulfide-Protected Amino Acids for the Fmoc Solid-Phase Synthesis of Lactam Cyclic Peptides under Mild Metal-Free Conditions. J Org Chem 2021; 86:8610-8619. [PMID: 34161109 DOI: 10.1021/acs.joc.1c00255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Lactam cyclic peptides are a class of interesting and pharmaceutically active molecules, but their previous syntheses have required the use of heavy metals and/or forcing conditions. Here, we describe the efficient application of the previously reported tert-butyl disulfide-protected amino acids and their use in the efficient, solid-phase synthesis of a series of lactam cyclic peptides under mild, metal-free conditions.
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Affiliation(s)
- Junyou Chen
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Tingting Cui
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Shuaishuai Sun
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Yanyan Guo
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Jingnan Chen
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Jun Wang
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
| | - Donald Bierer
- Department of Medicinal Chemistry, Bayer AG, Aprather Weg 18A, 42096 Wuppertal, Germany
| | - Yi-Ming Li
- School of Food and Biological Engineering, Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, P. R. China
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Szafraniec A, Grajda M, Jędrzejewska H, Szumna A, Iwanek W. Enaminone Substituted Resorcin[4]arene—Sealing of an Upper-Rim with a Directional System of Hydrogen-Bonds. Int J Mol Sci 2020; 21:ijms21207494. [PMID: 33050670 PMCID: PMC7589316 DOI: 10.3390/ijms21207494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/08/2020] [Accepted: 10/08/2020] [Indexed: 11/16/2022] Open
Abstract
The paper presents the synthesis of an enaminone resorcin[4]arene via a thermally activated o-quinomethide. The crystal structure indicates that in the solid state all enaminone units participate in a unidirectional seam of 12 intramolecular hydrogen bonds that are formed around the cavity. The molecule exhibits C2 symmetry, with two opposite-laying enaminone units directed inside the cavity (“in”), and the other two units outside the cavity (“out”). In the solution the enaminone resorcin[4]arene exists as a mixture of conformers with distribution controlled by temperature and solvent. The experimental data are compared with the results of theoretical calculations using DFT B3LYP/6-31G(d,p) and fast semi-empirical DFTB/GFN2-xTB method in various solvents.
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Affiliation(s)
- Anna Szafraniec
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 60-614 Poznań, Poland;
| | - Marcin Grajda
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.G.); (H.J.); (A.S.)
| | - Hanna Jędrzejewska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.G.); (H.J.); (A.S.)
| | - Agnieszka Szumna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.G.); (H.J.); (A.S.)
| | - Waldemar Iwanek
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326 Bydgoszcz, Poland
- Correspondence:
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