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Todorova SE, Rusew RI, Shivachev BL, Kurteva VB. Polydentate N, O-Ligands Possessing Unsymmetrical Urea Fragments Attached to a p-Cresol Scaffold. Molecules 2023; 28:6540. [PMID: 37764315 PMCID: PMC10536015 DOI: 10.3390/molecules28186540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
In this study, three series of polydentate N,O-ligands possessing unsymmetrical urea fragments attached to a p-cresol scaffold are obtained, namely mono- and bi-substituted open-chain aromatics, synthesised using a common experiment, as well as fused aryloxazinones. Separate protocols for the preparation of each series are developed. It is found that in the case of open-chain compounds, the reaction output is strongly dependent on both bis-amine and carbamoyl chloride substituents, while oxazinones can be effectively obtained via a common protocol. The products are characterized via 1D and 2D NMR spectra in solution and using single-crystal XRD. A preliminary study on the coordination abilities of the products performed via ITC shows that there are no substantial interactions in the pH range of 5.0-8.5 in general.
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Affiliation(s)
- Stanislava E. Todorova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 9, 1113 Sofia, Bulgaria
| | - Rusi I. Rusew
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 107, 1113 Sofia, Bulgaria;
| | - Boris L. Shivachev
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 107, 1113 Sofia, Bulgaria;
| | - Vanya B. Kurteva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 9, 1113 Sofia, Bulgaria
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2
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Bioassay-Guided Alkaloids Isolation from Camellia sinensis and Colchicum luteum: In Silico and In Vitro Evaluations for Protease Inhibition. Molecules 2023; 28:molecules28062459. [PMID: 36985431 PMCID: PMC10058905 DOI: 10.3390/molecules28062459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/25/2023] [Accepted: 03/01/2023] [Indexed: 03/10/2023] Open
Abstract
Bioassay-guided isolation from Camellia sinensis (Theaceae) and Colchicum luteum (Liliaceae) utilizing an in vitro model of protease assay revealed colchicine (1) and caffeine (2) from chloroform fractions, respectively. Their structures were validated using spectral techniques. The purified compounds were further optimized with Gaussian software utilizing the B3LYP functional and 6-31G(d,p) basis set. The result files were utilized to determine several global reactivity characteristics to explain the diverse behavior of the compounds. Colchicine (1) showed a higher inhibition of protease activity (63.7 ± 0.5 %age with IC50 = 0.83 ± 0.07 mM), compared with caffeine (2) (39.2 ± 1.3 %age). In order to determine the type of inhibition, compound 1 was further studied, and, based on Lineweaver–Burk/Dixon plots and their secondary replots, it was depicted that compound 1 was a non-competitive inhibitor of this enzyme, with a Ki value of 0.690 ± 0.09 mM. To elucidate the theoretical features of protease inhibition, molecular docking studies were performed against serine protease (PDB #1S0Q), which demonstrated that compound 1 had a strong interaction with the different amino acid residues located on the active site of this understudied enzyme, with a high docking score of 16.2 kcal/mol.
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3
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Smolobochkin AV, Gazizov AS, Yakhshilikova LJ, Sidlyaruk NA, Khamatgalimov AR, Burilov AR, Pudovik MA. Synthesis of substituted tetrahydropyrimidin-2-ones through nucleophilic cyclization / electrophilic substitution of 1-(3,3-diethoxypropyl)urea with C-nucleophiles. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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5
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Novel versatile synthesis method for amides, carbamates and ureas employing a Grignard base, an amine and an ester. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2021.100253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Liguori F, Moreno-Marrodán C, Barbaro P. Valorisation of plastic waste via metal-catalysed depolymerisation. Beilstein J Org Chem 2021; 17:589-621. [PMID: 33747233 PMCID: PMC7940818 DOI: 10.3762/bjoc.17.53] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/05/2021] [Indexed: 12/20/2022] Open
Abstract
Metal-catalysed depolymerisation of plastics to reusable building blocks, including monomers, oligomers or added-value chemicals, is an attractive tool for the recycling and valorisation of these materials. The present manuscript shortly reviews the most significant contributions that appeared in the field within the period January 2010–January 2020 describing selective depolymerisation methods of plastics. Achievements are broken down according to the plastic material, namely polyolefins, polyesters, polycarbonates and polyamides. The focus is on recent advancements targeting sustainable and environmentally friendly processes. Biocatalytic or unselective processes, acid–base treatments as well as the production of fuels are not discussed, nor are the methods for the further upgrade of the depolymerisation products.
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Affiliation(s)
- Francesca Liguori
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy
| | - Carmen Moreno-Marrodán
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy
| | - Pierluigi Barbaro
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy
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7
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Abstract
CO2 is a compound of high stability which proves useful in some organic syntheses as a solvent or component decreasing explosivity of gases. It is also a good carbonylating agent for aliphatic amines although not for aromatic ones, the latter being carbonylated with phosgene or, as in our previous works, with CO/O2 in the presence of Pd(II) complexes. In this work we have used the mixture of CO/O2 and CO2 for carbonylation of aniline to N,N’-diphenylurea. After optimization of the reaction conditions (56% of CO2 in CO2/CO mixture) we studied the activity of three kinds of pre-catalysts: (a) Pd(II) complexes, (b) Pdblack, and (c) palladium nanoparticles (PdNPs) in the presence of derivatives of pyridine (XnPy). The highest conversion of aniline (with selectivity towards N,N-diphenylurea ca. 90%) was observed for PdNPs. The results show that catalytic cycle involves Pd(0) stabilized by pyridine ligand as active species. Basing on this observation, we put the hypothesis that application of PdNPs instead of Pd(II) complex can efficiently reduce the reaction time.
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8
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Devi P, Lambu MR, Baskaran S. A novel one-pot method for the stereoselective synthesis of tetrahydropyrimidinones in a low melting mixture. Org Biomol Chem 2020; 18:4164-4168. [PMID: 32436516 DOI: 10.1039/d0ob00697a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A direct and metal free one-pot method has been developed for the stereoselective synthesis of tetrahydropyrimidinone derivatives from a vinyl arene and formaldehyde using a tartaric acid-dimethylurea (TA : DMU) melt as a green reaction medium. The substrate scope of this method is very general and the tetrahydropyrimidinone (THPM) derivatives are synthesized in good yields with a high degree of diastereoselectivity. In this reaction, the melt plays a triple role as the solvent, catalyst and reagent.
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Affiliation(s)
- Pramila Devi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
| | | | - Sundarababu Baskaran
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
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9
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Eftaiha AF, Qaroush AK, Alsayyed AW, Al-Qaisi F, Alsoubani F, Assaf KI. The eternal battle to combat global warming: (thio)urea as a CO 2 wet scrubbing agent. Phys Chem Chem Phys 2020; 22:11829-11837. [PMID: 32424389 DOI: 10.1039/d0cp00629g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(Thio)Urea scaffolds are best known for their importance as intermediates in organic synthesis. In this work, a mechanistic study of the reaction between urea (U), (2-hydroxyethyl)urea (U-EtOH) and thiourea (tU)/NaH in DMSO with CO2 was carried out. While both U/tU reacted with CO2via a 1 : 2 mechanism through the formation of the keto (thio)carbamide-carboxylate adducts (k-U/tU-CO2- Na+), U-EtOH gave mixed CO2-adducts composed of organic carbonate and carbamide-carboxylate moieties (Na+-CO2-U-Et-OCO2- Na+). Moreover, we recorded for the first time, a new type of bond, namely sodium carbamimidothiocarbonate (e-tU-SCO2- Na+), upon bubbling CO2 in the DMSO solution of tU due to the persistence of the enol form (e-tU) and the better nucleophilicity of sulfur over nitrogen focal points. The reaction mechanisms were proven by 1D and 2D nuclear magnetic resonance (NMR) and ex situ attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopies. The stability of these bonds was studied following the changes in 1H-NMR as a function of temperature, which indicated the reversibility of these reactions. Furthermore, the proposed mechanisms were explored theoretically via density functional theory (DFT) calculations by analyzing the energetics of the anticipated products.
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Affiliation(s)
- Ala'a F Eftaiha
- Department of Chemistry, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | - Abdussalam K Qaroush
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan.
| | - Ahed W Alsayyed
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan.
| | - Feda'a Al-Qaisi
- Department of Chemistry, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | - Fatima Alsoubani
- Department of Chemistry, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
| | - Khaleel I Assaf
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, Al-Salt 19117, Jordan.
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10
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Smolobochkin AV, Gazizov AS, Voronina JK, Strelnik AG, Rizbayeva TS, Burilov AR, Pudovik MA. Reactions of 1‐(3,3‐Diethoxypropyl)urea with Phenols: Synthesis of 1,6‐Disubstituted Tetrahydropyrimidine‐2(1H)‐ones. ChemistrySelect 2019. [DOI: 10.1002/slct.201902754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Andrey V. Smolobochkin
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
| | - Almir S. Gazizov
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
| | - Julia K. Voronina
- N.S. Kurnakov Institute of General and Inorganic ChemistryRussian Academy of Sciences 31 Leninsky Ave. Moscow Russian Federation
| | - Anna G. Strelnik
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
| | - Tanzilya S. Rizbayeva
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
| | - Alexander R. Burilov
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
| | - Michail A. Pudovik
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific CenterRussian Academy of Sciences 8 Arbuzova str. Kazan Russian Federation
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11
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Tomishige K, Tamura M, Nakagawa Y. CO
2
Conversion with Alcohols and Amines into Carbonates, Ureas, and Carbamates over CeO
2
Catalyst in the Presence and Absence of 2‐Cyanopyridine. CHEM REC 2018; 19:1354-1379. [DOI: 10.1002/tcr.201800117] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 10/07/2018] [Indexed: 02/04/2023]
Affiliation(s)
- Keiichi Tomishige
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
| | - Masazumi Tamura
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry, Graduate School of EngineeringTohoku University Aoba 6-6-07, Aramaki, Aoba-ku Sendai, 980-8579 Japan
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12
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Kang S, Kim HK. Facile direct synthesis of unsymmetrical ureas from N-Alloc-, N-Cbz-, and N-Boc-protected amines using DABAL-Me3. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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13
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Iannone F, Casiello M, Monopoli A, Cotugno P, Sportelli MC, Picca RA, Cioffi N, Dell’Anna MM, Nacci A. Ionic liquids/ZnO nanoparticles as recyclable catalyst for polycarbonate depolymerization. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.11.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Lee A, Kim HK, Thompson DH. A Facile Method for the Preparation of Unsymmetrical Ureas Utilizing Zirconium(IV) Chloride. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10646] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anna Lee
- Department of Chemistry; Myongji University; Yongin 449-728 Republic of Korea
| | - Hee-Kwon Kim
- Department of Nuclear Medicine; Molecular Imaging and Therapeutic Medicine Research Center, Biomedical Research Institute, Chonbuk National University Medical School and Hospital; Jeonju 561-712 Republic of Korea
- Department of Chemistry; Purdue University; West Lafayette IN 47907 USA
| | - David H. Thompson
- Department of Chemistry; Purdue University; West Lafayette IN 47907 USA
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15
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Casiello M, Iannone F, Cotugno P, Monopoli A, Cioffi N, Ciminale F, Trzeciak AM, Nacci A. Copper(II)-catalysed oxidative carbonylation of aminols and amines in water: A direct access to oxazolidinones, ureas and carbamates. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.06.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Fernandez M, Ahmad S, Abreu JI, Sarai A. Large-scale recognition of high-affinity protease–inhibitor complexes using topological autocorrelation and support vector machines. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1059937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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17
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Minić A, Stevanović D, Damljanović I, Pejović A, Vukićević M, Bogdanović GA, Radulović NS, Vukićević RD. Synthesis of ferrocene-containing six-membered cyclic ureas via α-ferrocenyl carbocations. RSC Adv 2015. [DOI: 10.1039/c5ra01383f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A convenient method for the synthesis of ferrocene-containing six membered cyclic ureas was developed.
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Affiliation(s)
- Aleksandra Minić
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Dragana Stevanović
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Ivan Damljanović
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Anka Pejović
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Mirjana Vukićević
- Department of Pharmacy
- Faculty of Medicinal Sciences
- University of Kragujevac
- 34000 Kragujevac
- Serbia
| | - Goran A. Bogdanović
- Vinča Institute of Nuclear Sciences
- University of Belgrade
- 11001 Belgrade
- Serbia
| | - Niko S. Radulović
- Department of Chemistry
- Faculty of Science and Mathematics
- University of Niš
- 18000 Niš
- Serbia
| | - Rastko D. Vukićević
- Department of Chemistry
- Faculty of Science
- University of Kragujevac
- 34000 Kragujevac
- Serbia
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18
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Model for vaccine design by prediction of B-epitopes of IEDB given perturbations in peptide sequence, in vivo process, experimental techniques, and source or host organisms. J Immunol Res 2014; 2014:768515. [PMID: 24741624 PMCID: PMC3987976 DOI: 10.1155/2014/768515] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 11/17/2013] [Indexed: 11/17/2022] Open
Abstract
Perturbation methods add variation terms to a known experimental solution of one problem to approach a solution for a related problem without known exact solution. One problem of this type in immunology is the prediction of the possible action of epitope of one peptide after a perturbation or variation in the structure of a known peptide and/or other boundary conditions (host organism, biological process, and experimental assay). However, to the best of our knowledge, there are no reports of general-purpose perturbation models to solve this problem. In a recent work, we introduced a new quantitative structure-property relationship theory for the study of perturbations in complex biomolecular systems. In this work, we developed the first model able to classify more than 200,000 cases of perturbations with accuracy, sensitivity, and specificity >90% both in training and validation series. The perturbations include structural changes in >50000 peptides determined in experimental assays with boundary conditions involving >500 source organisms, >50 host organisms, >10 biological process, and >30 experimental techniques. The model may be useful for the prediction of new epitopes or the optimization of known peptides towards computational vaccine design.
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19
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Duardo-Sánchez A, Munteanu CR, Riera-Fernández P, López-Díaz A, Pazos A, González-Díaz H. Modeling Complex Metabolic Reactions, Ecological Systems, and Financial and Legal Networks with MIANN Models Based on Markov-Wiener Node Descriptors. J Chem Inf Model 2013; 54:16-29. [DOI: 10.1021/ci400280n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Aliuska Duardo-Sánchez
- Department
of Information and Communication Technologies, Computer Science Faculty, University of A Coruña, Campus de Elviña, 15071, A Coruña, A Coruña, Spain
- Department of Special Public Law, Financial
and Tributary Law Area, Faculty of Law, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, A Coruña, Spain
| | - Cristian R. Munteanu
- Department
of Information and Communication Technologies, Computer Science Faculty, University of A Coruña, Campus de Elviña, 15071, A Coruña, A Coruña, Spain
| | - Pablo Riera-Fernández
- Department
of Information and Communication Technologies, Computer Science Faculty, University of A Coruña, Campus de Elviña, 15071, A Coruña, A Coruña, Spain
| | - Antonio López-Díaz
- Department of Special Public Law, Financial
and Tributary Law Area, Faculty of Law, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, A Coruña, Spain
| | - Alejandro Pazos
- Department
of Information and Communication Technologies, Computer Science Faculty, University of A Coruña, Campus de Elviña, 15071, A Coruña, A Coruña, Spain
| | - Humberto González-Díaz
- Department of Organic Chemistry II, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Bizkaia, Spain
- IKERBASQUE, Basque
Foundation for Science, 48011, Bilbao, Biscay, Spain
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20
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Alonso N, Caamaño O, Romero-Duran FJ, Luan F, D. S. Cordeiro MN, Yañez M, González-Díaz H, García-Mera X. Model for high-throughput screening of multitarget drugs in chemical neurosciences: synthesis, assay, and theoretic study of rasagiline carbamates. ACS Chem Neurosci 2013; 4:1393-403. [PMID: 23855599 DOI: 10.1021/cn400111n] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The disappointing results obtained in recent clinical trials renew the interest in experimental/computational techniques for the discovery of neuroprotective drugs. In this context, multitarget or multiplexing QSAR models (mt-QSAR/mx-QSAR) may help to predict neurotoxicity/neuroprotective effects of drugs in multiple assays, on drug targets, and in model organisms. In this work, we study a data set downloaded from CHEMBL; each data point (>8000) contains the values of one out of 37 possible measures of activity, 493 assays, 169 molecular or cellular targets, and 11 different organisms (including human) for a given compound. In this work, we introduce the first mx-QSAR model for neurotoxicity/neuroprotective effects of drugs based on the MARCH-INSIDE (MI) method. First, we used MI to calculate the stochastic spectral moments (structural descriptors) of all compounds. Next, we found a model that classified correctly 2955 out of 3548 total cases in the training and validation series with Accuracy, Sensitivity, and Specificity values>80%. The model also showed excellent results in Computational-Chemistry simulations of High-Throughput Screening (CCHTS) experiments, with accuracy=90.6% for 4671 positive cases. Next, we reported the synthesis, characterization, and experimental assays of new rasagiline derivatives. We carried out three different experimental tests: assay (1) in the absence of neurotoxic agents, assay (2) in the presence of glutamate, and assay (3) in the presence of H2O2. Compounds 11 with 27.4%, 8 with 11.6%, and 9 with 15.4% showed the highest neuroprotective effects in assays (1), (2), and (3), respectively. After that, we used the mx-QSAR model to carry out a CCHTS of the new compounds in >400 unique pharmacological tests not carried out experimentally. Consequently, this model may become a promising auxiliary tool for the discovery of new drugs for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Nerea Alonso
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, Spain
| | - Olga Caamaño
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, Spain
| | - Francisco J. Romero-Duran
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, Spain
| | - Feng Luan
- REQUIMTE/Department of Chemistry
and Biochemistry, University of Porto,
4169-007, Porto, Portugal
- Department of Applied Chemistry, Yantai University, Yantai 264005, People’s Republic
of China
| | | | - Matilde Yañez
- Department of
Pharmacology,
Faculty of Pharmacy, USC, 15782, Santiago
de Compostela, Spain
| | - Humberto González-Díaz
- Departament
of Organic Chemistry
II, University of the Basque Country UPV/EHU, 48940, Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48011, Bilbao, Spain
| | - Xerardo García-Mera
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782, Santiago de Compostela, Spain
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21
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Luan F, Cordeiro MND, Alonso N, García-Mera X, Caamaño O, Romero-Duran FJ, Yañez M, González-Díaz H. TOPS-MODE model of multiplexing neuroprotective effects of drugs and experimental-theoretic study of new 1,3-rasagiline derivatives potentially useful in neurodegenerative diseases. Bioorg Med Chem 2013; 21:1870-9. [DOI: 10.1016/j.bmc.2013.01.035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 01/13/2013] [Accepted: 01/17/2013] [Indexed: 01/08/2023]
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22
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Suhas R, Chandrashekar S, Gowda DC. Synthesis of uriedo and thiouriedo derivatives of peptide conjugated heterocycles - A new class of promising antimicrobials. Eur J Med Chem 2011; 48:179-91. [PMID: 22209564 DOI: 10.1016/j.ejmech.2011.12.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 12/06/2011] [Accepted: 12/07/2011] [Indexed: 01/07/2023]
Abstract
Forty five new derivatives of ureas and thioureas were synthesized by the reaction of peptide conjugated heterocycles with isocyanates and isothiocyanates respectively. All the compounds have been characterized by IR, (1)H NMR, mass and elemental analysis. The compounds were evaluated for their ability to inhibit the growth of a panel of microorganisms and all the synthesized compounds displayed an excellent antimicrobial activity. From structure-activity relationship studies, it was apparent that thioureas infact is slightly more active than ureas. Also, substituents on the phenyl ring of the title compounds play a key role in the activity. Further, compound 40 is nearly twenty times more potent than the standard used. These results present a platform for the further studies in this line.
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Affiliation(s)
- R Suhas
- Department of Studies in Chemistry, Manasagangotri, University of Mysore, Mysore 570 006, India
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Lather V, Fernandes M. QSAR Models for Prediction of PPARδ Agonistic Activity of Indanylacetic Acid Derivatives. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/qsar.200810092] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Lather V, Kairys V, Fernandes MX. Quantitative structure-activity relationship models with receptor-dependent descriptors for predicting peroxisome proliferator-activated receptor activities of thiazolidinedione and oxazolidinedione derivatives. Chem Biol Drug Des 2009; 73:428-41. [PMID: 19243388 DOI: 10.1111/j.1747-0285.2009.00788.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A quantitative structure-activity relationship study has been carried out, in which the relationship between the peroxisome proliferator-activated receptor alpha and the peroxisome proliferator-activated receptor gamma agonistic activities of thiazolidinedione and oxazolidinedione derivatives and quantitative descriptors, V(site) calculated in a receptor-dependent manner is modeled. These descriptors quantify the volume occupied by the optimized ligands in regions that are either common or specific to the superimposed binding sites of the targets under consideration. The quantitative structure-activity relationship models were built by forward stepwise linear regression modeling for a training set of 27 compounds and validated for a test set of seven compounds, resulting in a squared correlation coefficient value of 0.90 for peroxisome proliferator-activated receptor alpha and of 0.89 for peroxisome proliferator-activated receptor gamma. The leave-one-out cross-validation and test set predictability squared correlation coefficient values for these models were 0.85 and 0.62 for peroxisome proliferator-activated receptor alpha and 0.89 and 0.50 for peroxisome proliferator-activated receptor gamma respectively. A dual peroxisome proliferator-activated receptor model has also been developed, and it indicates the structural features required for the design of ligands with dual peroxisome proliferator-activated receptor activity. These quantitative structure-activity relationship models show the importance of the descriptors here introduced in the prediction and interpretation of the compounds affinity and selectivity.
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Affiliation(s)
- Viney Lather
- Centro de Química da Madeira, Departamento de Química, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal
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25
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Katritzky AR, Pacureanu LM, Slavov SH, Dobchev DA, Shah DO, Karelson M. QSPR study of the first and second critical micelle concentrations of cationic surfactants. Comput Chem Eng 2009. [DOI: 10.1016/j.compchemeng.2008.09.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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26
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Takkis K, Sild S. QSAR Modeling of HIV-1 Protease Inhibition on Six- and Seven-membered Cyclic Ureas. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/qsar.200860006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Katritzky AR, Pacureanu LM, Slavov SH, Dobchev DA, Karelson M. QSPR Study of Critical Micelle Concentrations of Nonionic Surfactants. Ind Eng Chem Res 2008. [DOI: 10.1021/ie800954k] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alan R. Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, Institute of Chemistry of Romanian Academy, M. Viteazul 24, Timisoara 300223, Romania, Institute of Chemistry, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia, and MolCode Ltd., Soola 8, Tartu 51013, Estonia
| | - Liliana M. Pacureanu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, Institute of Chemistry of Romanian Academy, M. Viteazul 24, Timisoara 300223, Romania, Institute of Chemistry, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia, and MolCode Ltd., Soola 8, Tartu 51013, Estonia
| | - Svetoslav H. Slavov
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, Institute of Chemistry of Romanian Academy, M. Viteazul 24, Timisoara 300223, Romania, Institute of Chemistry, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia, and MolCode Ltd., Soola 8, Tartu 51013, Estonia
| | - Dimitar A. Dobchev
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, Institute of Chemistry of Romanian Academy, M. Viteazul 24, Timisoara 300223, Romania, Institute of Chemistry, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia, and MolCode Ltd., Soola 8, Tartu 51013, Estonia
| | - Mati Karelson
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, Institute of Chemistry of Romanian Academy, M. Viteazul 24, Timisoara 300223, Romania, Institute of Chemistry, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia, and MolCode Ltd., Soola 8, Tartu 51013, Estonia
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28
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Guha R. On the interpretation and interpretability of quantitative structure–activity relationship models. J Comput Aided Mol Des 2008; 22:857-71. [DOI: 10.1007/s10822-008-9240-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Accepted: 08/14/2008] [Indexed: 01/28/2023]
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29
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Katritzky AR, Kuanar M, Dobchev DA, Vanhoecke BWA, Karelson M, Parmar VS, Stevens CV, Bracke ME. QSAR modeling of anti-invasive activity of organic compounds using structural descriptors. Bioorg Med Chem 2006; 14:6933-9. [PMID: 16908166 DOI: 10.1016/j.bmc.2006.06.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Revised: 06/14/2006] [Accepted: 06/19/2006] [Indexed: 11/20/2022]
Abstract
The anti-invasive activity of 139 compounds was correlated by an artificial neural network approach with descriptors calculated solely from the molecular structures using CODESSA Pro. The best multilinear regression method implemented in CODESSA Pro was used for a pre-selection of descriptors. The resulting nonlinear (artificial neural network) QSAR model predicted the exact class for 66 (71%) of the training set of 93 compounds and 32 (70%) of validation set of 46 compounds. The standard deviation ratios for the both training and validation sets are less than unity, indicating a satisfactory predictive capability for classification of the nature of the anti-invasive activity data. The proposed model can be used for the prediction of the anti-invasive activity of novel classes of compounds enabling a virtual screening of large databases of anticancer drugs.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA.
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Fernández M, Caballero J. Modeling of activity of cyclic urea HIV-1 protease inhibitors using regularized-artificial neural networks. Bioorg Med Chem 2006; 14:280-94. [PMID: 16202604 DOI: 10.1016/j.bmc.2005.08.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 08/04/2005] [Accepted: 08/05/2005] [Indexed: 11/26/2022]
Abstract
Artificial neural networks (ANNs) were used to model both inhibition of HIV-1 protease (K(i)) and inhibition of HIV replication (IC90) for 55 cyclic urea derivatives using constitutional and 2D descriptors. As a preliminary step, linear dependences were established by multiple linear regression (MLR) approaches, selecting the relevant descriptors by genetic algorithm (GA) feature selection. For ANN models non-linear GA feature selection was also applied. Non-linear modeling of K(i) overcame the results of the linear one using four properties, keeping in mind standard Pearson R correlation coefficients (0.931 vs. 0.862) and leave one out (LOO) cross-validation analysis (Q(LOO)2 = 0.703 vs. 0.510). On the other hand, IC90 modeling was insoluble by a linear approach: no predictive model was achieved; however, a non-linear relation was encountered according to statistic results (R = 0.891; Q(LOO)2 = 0.568). The best non-linear models suggested the influence of the presence of nitrogen atoms and the molecular volume distribution in the inhibitor structures on the HIV-1 protease inhibition as well as that the inhibition of HIV replication was dependent on the occurrence of five-member rings. Finally, inhibitors were well distributed regarding its activity levels in a Kohonen self-organizing map built using the input variables of the best non-linear models.
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Affiliation(s)
- Michael Fernández
- Molecular Modeling Group, Center for Biotechnological Studies, University of Matanzas, Matanzas, Cuba
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Esteves-Souza A, Pissinate K, Nascimento MDG, Grynberg NF, Echevarria A. Synthesis, cytotoxicity, and DNA-topoisomerase inhibitory activity of new asymmetric ureas and thioureas. Bioorg Med Chem 2006; 14:492-9. [PMID: 16183295 DOI: 10.1016/j.bmc.2005.08.031] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2005] [Revised: 08/15/2005] [Accepted: 08/16/2005] [Indexed: 12/01/2022]
Abstract
A new series of N-3,3-diphenylpropyl-N-(p-X-benzyl)-N'-phenylureas (5a-g) and thioureas (6a-g) were synthesized by the reaction of secondary amines and phenyl isocyanate or isothiocyanate. The cytotoxic effects of the urea and thiourea derivatives were evaluated by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay against Ehrlich carcinoma and K562 human leukemia cells. Moreover, the activity of compounds in the inhibition of DNA topoisomerases I and II-alpha was tested. The results indicated that the compounds presented important and promising antiproliferative action.
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32
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López Ó, Maza S, Maya I, Fuentes J, Fernández-Bolaños JG. New synthetic approaches to sugar ureas. Access to ureido-β-cyclodextrins. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Lather V, Madan AK. Topological models for the prediction of HIV-protease inhibitory activity of tetrahydropyrimidin-2-ones. J Mol Graph Model 2005; 23:339-45. [PMID: 15670954 DOI: 10.1016/j.jmgm.2004.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2004] [Revised: 10/21/2004] [Accepted: 11/02/2004] [Indexed: 11/28/2022]
Abstract
Relationship between the topological indices and HIV-protease inhibitory activity of tetrahydropyrimidine-2-ones has been investigated. Three topological indices, Wiener's index--a distance based topological descriptor, Zagreb group parameter--an adjacency based topological descriptor and eccentric connectivity index--an adjacency-cum-distance based topological descriptor were used for the present investigations. A dataset comprising of 80 substituted tetrahydropyrimidine-2-one analogues was selected for the present studies. The values of the Wiener's index, Zagreb group parameter and eccentric connectivity index for each of the 80 compounds comprising the dataset were computed using an in-house computer program. The dataset was divided randomly into training and test sets. Resultant data was analyzed and suitable models were developed after identifying the active ranges in the training set. Subsequently, a biological activity was assigned to each of the compound involved in the test set using these models, which was then compared with the reported HIV-protease inhibitory activity. Accuracy of prediction using these models was found to vary from a minimum of approximately 86% to a maximum of approximately 88%.
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Affiliation(s)
- Viney Lather
- Faculty of Pharmaceutical Sciences, M. D. University, Rohtak-124001, India
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