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de Oliveira DBC, Silva LB, da Silva BV, Borges TC, Marques BC, Dos Santos MB, de Oliveira LF, Bolzani VS, Rodrigues ARA, Regasini LO, Andrade AA. A new acridone with antifungal properties against Candida spp. and dermatophytes, and antibiofilm activity against C. albicans. J Appl Microbiol 2019; 127:1362-1372. [PMID: 31297951 DOI: 10.1111/jam.14381] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 07/01/2019] [Accepted: 07/04/2019] [Indexed: 12/11/2022]
Abstract
AIM The increase in the number of fungal infections worldwide, coupled with the limitations of current antifungal chemotherapy, demand the development of safe and effective new antifungals. Here, we presented the synthesis of a novel acridone (M14) and its antifungal properties against Candida and dermatophytes species. METHODS AND RESULTS A series of 17 acridones was designed, synthesized and tested for its antifungal activity. The minimum inhibitory concentration (MIC) was determined by the broth microdilution method. Only the acridone M14 showed growth-inhibitory activity against reference strains and clinical isolates of Candida and dermatophytes, with MIC range of 7·81-31·25 µg ml-1 . Moreover, M14 exhibited fungicidal activity and prevented biofilm formation by C. albicans as well as reduced the viability of preformed biofilms, even at sub-MICs. The confocal laser scanning microscopy analysis revealed that C. albicans hyphal growth was completely inhibited in the presence of M14. Similarly, there was a severe inhibition on hyphal growth of Trichophyton rubrum. We also found that M14 has relatively low toxicity to human fibroblasts. CONCLUSIONS The new acridone M14 has antifungal properties against Candida spp. and dermatophytes, and antibiofilm activity against C. albicans. In addition, M14 is relatively selective to fungal cells compared to human normal cells. SIGNIFICANCE AND IMPACT OF THE STUDY Because of its in vitro antifungal activity, anti-Candida biofilm effect and moderate cytotoxicity towards normal human cell, M14 may serve as a valuable lead compound to develop a new antifungal agent.
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Affiliation(s)
- D B C de Oliveira
- Discipline of Microbiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - L B Silva
- Discipline of Microbiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - B V da Silva
- Discipline of Microbiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - T C Borges
- Discipline of Microbiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - B C Marques
- Laboratory of Green and Medicinal Chemistry, Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - M B Dos Santos
- Laboratory of Green and Medicinal Chemistry, Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - L F de Oliveira
- Discipline of Physiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - V S Bolzani
- Department of Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - A R A Rodrigues
- Discipline of Physiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - L O Regasini
- Laboratory of Green and Medicinal Chemistry, Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - A A Andrade
- Discipline of Microbiology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
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Bernardino K, Pinto MEF, Bolzani VS, de Moura AF, Batista Junior JM. Pinpointing disulfide connectivities in cysteine-rich proteins. Chem Commun (Camb) 2018; 53:7337-7340. [PMID: 28508909 DOI: 10.1039/c7cc02333b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple MD-based protocol is presented to accurately predict both the sequence and order of disulfide bond formation in proteins containing multiple cysteine residues. It provides a detailed description of their dynamical and structural features, which can be used to perform ensemble-averaged ECD calculations. Plant cyclotides are used as model compounds.
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Affiliation(s)
- K Bernardino
- Department of Chemistry, Federal University of São Carlos - UFSCar, São Carlos, SP 13565-905, Brazil.
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Queiroz MMF, Marti G, Queiroz EF, Marcourt L, Castro-Gamboa I, Bolzani VS, Wolfender JL. LC-MS/MS quantitative determination of Tetrapterys mucronata alkaloids, a plant occasionally used in ayahuasca preparation. Phytochem Anal 2015; 26:183-188. [PMID: 25620461 DOI: 10.1002/pca.2548] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 09/26/2014] [Accepted: 10/01/2014] [Indexed: 06/04/2023]
Abstract
INTRODUCTION Tetrapterys mucronata Cav. (Malpighiaceae) is a plant used in some regions of Brazil in the preparation of ayahuasca. OBJECTIVE To determine the content of the main tryptamine alkaloids in the stem bark of T. mucronata Cav. and assess their possible toxic and hallucinogenic properties based on the doses found in a water decoction that mimics the ayahuasca preparation. METHODS Four alkaloids previously described for their toxic and hallucinogenic properties were quantitated by multiple reaction monitoring HPLC combined with electrospray ionisation and tandem MS (HPLC-ESI/MS/MS) in the water decoction and ethanolic extracts from the bark of T. mucronata. RESULTS Exhaustive extraction of the stem barks with ethanol revealed the following alkaloid levels: bufotenine (1) 3.26 ± 0.31 mg/g, 5-methoxy-N-methyltryptamine (2) 0.88 ± 0.08 mg/g, 5-methoxy-bufotenine (3) 3.07 ± 0.22 mg/g and 2-methyl-6-methoxy-1,2,3,4-tetrahydro-β-carboline (4) 0.14 ± 0.004 mg/g. The water decoction presented slightly lower levels, ranging between 2.32 ± 0.14, 0.50 ± 0.04, 1.53 ± 0.09 and 0.10 ± 0.01 mg/g for (1), (2), (3) and (4) respectively. CONCLUSIONS The HPLC-ESI/MS/MS quantitation revealed significant alkaloid levels, in particular for bufotenine and 5-methoxy-bufotenine. As such compounds are known for their toxic and hallucinogenic properties, these results indicate that the consumption of this plant as an ingredient in ayahuasca preparations may present a risk to consumers.
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Affiliation(s)
- M M F Queiroz
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Instituto de Química, Universidade Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
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Venturini D, Pastrello B, Zeraik ML, Pauli I, Andricopulo AD, Silva-Filho LC, Bolzani VS, Morgon NH, da Souza AR, Ximenes VF. Experimental, DFT and docking simulations of the binding of diapocynin to human serum albumin: induced circular dichroism. RSC Adv 2015. [DOI: 10.1039/c5ra10960d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Axial chirality in diapocynin induced by human albumin.
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Affiliation(s)
- Diego Venturini
- Department of Chemistry
- Faculty of Sciences
- São Paulo State University (UNESP)
- Bauru
- Brazil
| | - Bruna Pastrello
- Department of Chemistry
- Faculty of Sciences
- São Paulo State University (UNESP)
- Bauru
- Brazil
| | - Maria Luiza Zeraik
- Nuclei of Bioassays
- Ecophysiology and Biosynthesis of Natural Products (NuBBE)
- Department of Organic Chemistry
- Institute of Chemistry
- São Paulo State University (UNESP)
| | - Ivani Pauli
- Computational and Medicinal Chemistry Laboratory
- Physics Institute of São Carlos
- University of São Paulo (USP)
- São Carlos
- Brazil
| | - Adriano Defini Andricopulo
- Computational and Medicinal Chemistry Laboratory
- Physics Institute of São Carlos
- University of São Paulo (USP)
- São Carlos
- Brazil
| | | | - V. S. Bolzani
- Nuclei of Bioassays
- Ecophysiology and Biosynthesis of Natural Products (NuBBE)
- Department of Organic Chemistry
- Institute of Chemistry
- São Paulo State University (UNESP)
| | - Nelson Henrique Morgon
- Department of Chemistry
- Institute of Chemistry
- Campinas State University (UNICAMP)
- Campinas
- Brazil
| | - A. R. da Souza
- Department of Chemistry
- Faculty of Sciences
- São Paulo State University (UNESP)
- Bauru
- Brazil
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Flausino OA, Dufau L, Regasini LO, Petrônio MS, Silva DHS, Rose T, Bolzani VS, Reboud-Ravaux M. Alkyl hydroxybenzoic acid derivatives that inhibit HIV-1 protease dimerization. Curr Med Chem 2013; 19:4534-40. [PMID: 22963666 DOI: 10.2174/092986712803251557] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 08/14/2012] [Accepted: 08/26/2012] [Indexed: 11/22/2022]
Abstract
The therapeutic potential of gallic acid and its derivatives as anti-cancer, antimicrobial and antiviral agents is well known. We have examined the mechanism by which natural gallic acid and newly synthesized gallic acid alkyl esters and related protocatechuic acid alkyl esters inhibit HIV-1 protease to compare the influence of the aromatic ring substitutions on inhibition. We used Zhang-Poorman's kinetic analysis and fluorescent probe binding to demonstrate that several gallic and protecatechuic acid alkyl esters inhibited HIV-1 protease by preventing the dimerization of this obligate homodimeric aspartic protease rather than targeting the active site. The tri-hydroxy substituted benzoic moiety in gallates was more favorable than the di-substituted one in protocatechuates. In both series, the type of inhibition, its mechanism and the inhibitory efficiency dramatically depended on the length of the alkyl chain: no inhibition with alkyl chains less than 8 carbon atoms long. Molecular dynamics simulations corroborated the kinetic data and propose that gallic esters are intercalated between the two N- and C-monomer ends. They complete the β-sheet and disrupt the dimeric enzyme. The best gallic ester (14 carbon atoms, K(id) of 320 nM) also inhibited the multi-mutated protease MDR-HM. These results will aid the rational design of future generations of non-peptide inhibitors of HIV-1 protease dimerization that inhibit multi-mutated proteases. Finally, our work suggests the wide use of gallic and protocatechuic alkyl esters to dissociate intermolecular β-sheets involved in protein-protein interactions.
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Affiliation(s)
- O A Flausino
- Enzymologie Moléculaire et Fonctionnelle, UR4, UPMC-Sorbonne Universités, 7 Quai St Bernard, 75252 Paris Cedex 05, France
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Zeraik ML, Ximenes VF, Regasini LO, Dutra LA, Silva DHS, Fonseca LM, Coelho D, Machado SAS, Bolzani VS. 4'-Aminochalcones as novel inhibitors of the chlorinating activity of myeloperoxidase. Curr Med Chem 2013; 19:5405-13. [PMID: 22963624 DOI: 10.2174/092986712803833344] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 08/28/2012] [Accepted: 08/28/2012] [Indexed: 11/22/2022]
Abstract
The excessive activation of neutrophils generates reactive oxygen species (ROS) and the secretion of primary granular enzymes, such as myeloperoxidase (MPO), which is implicated in numerous inflammatory diseases. The aim of this study was to evaluate chalcones as inhibitors of the chlorinating activity of MPO using in vitro and ex vivo assays. In addition to cytotoxic properties, the inhibition of respiratory burst, the scavenger capacity, and the oxidation potential were measured. 4'-Aminochalcone (1), 4'-amino-4- fluorochalcone (2), and 4'-amino-4-methylchalcone (3) exhibited potent inhibition of the chlorinating activity of MPO, as evaluated in a neutrophil system and a free cell system, to the following degree: (1) IC50 = 0.265 � 0.036 μmol L-1; (2) IC50 = 0.250 � 0.081 μmol L-1; and (3) IC50 = 0.250 � 0.012 μmol L-1. These values were similar to those for 5-fluorotryptamine (IC50 = 0.192 � 0.012 μmol L-1), a compound considered to be a potent MPO inhibitor. These aminochalcones were not toxic to neutrophils at concentrations below 100 μmol L- 1, as determined by the trypan blue exclusion assay. Compounds 1-3 presented a high oxidation potential (Epa1 ≉ 0.80 V), low scavenger capacity against DPPH• and HOCl, and low inhibition of respiratory burst. These data indicated that aminochalcones are potent inhibitors of MPO chlorinating activity, a new property for chalcone derivatives, given that they are neither antioxidant agents nor inhibitors of respiratory burst. In conclusion, the selected aminochalcones have potential as pharmacological agents for inflammatory diseases.
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Affiliation(s)
- M L Zeraik
- Department of Organic Chemistry, Nuclei of Bioassays, Ecophysiology and Biosynthesis of Natural Products (NuBBE), Institute of Chemistry, Sao Paulo State University (UNESP), P. O. Box 355, 14800- 900, Araraquara, Sao Paulo, Brazil
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Silva IC, Regasini LO, Petrônio MS, Silva DHS, Bolzani VS, Belasque J, Sacramento LVS, Ferreira H. Antibacterial activity of alkyl gallates against Xanthomonas citri subsp. citri. J Bacteriol 2013; 195:85-94. [PMID: 23104804 PMCID: PMC3536167 DOI: 10.1128/jb.01442-12] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 10/19/2012] [Indexed: 11/20/2022] Open
Abstract
The plant-pathogenic bacterium Xanthomonas citri subsp. citri is the causal agent of Asiatic citrus canker, a serious disease that affects all the cultivars of citrus in subtropical citrus-producing areas worldwide. There is no curative treatment for citrus canker; thus, the eradication of infected plants constitutes the only effective control of the spread of X. citri subsp. citri. Since the eradication program in the state of São Paulo, Brazil, is under threat, there is a clear risk of X. citri subsp. citri becoming endemic in the main orange-producing area in the world. Here we evaluated the potential use of alkyl gallates to prevent X. citri subsp. citri growth. These esters displayed a potent anti-X. citri subsp. citri activity similar to that of kanamycin (positive control), as evaluated by the resazurin microtiter assay (REMA). The treatment of X. citri subsp. citri cells with these compounds induced altered cell morphology, and investigations of the possible intracellular targets using X. citri subsp. citri strains labeled for the septum and centromere pointed to a common target involved in chromosome segregation and cell division. Finally, the artificial inoculation of citrus with X. citri subsp. citri cells pretreated with alkyl gallates showed that the bacterium loses the ability to colonize its host, which indicates the potential of these esters to protect citrus plants against X. citri subsp. citri infection.
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Affiliation(s)
- I. C. Silva
- Faculdade de Ciências Farmacêuticas (FCF), Departamento de Ciências Biológicas, Universidade Estadual Paulista (UNESP), Araraquara, Sao Paulo, Brazil
| | - L. O. Regasini
- Departamento de Química Orgânica, Instituto de Química, UNESP, Araraquara, Sao Paulo, Brazil
| | - M. S. Petrônio
- Departamento de Química Orgânica, Instituto de Química, UNESP, Araraquara, Sao Paulo, Brazil
| | - D. H. S. Silva
- Departamento de Química Orgânica, Instituto de Química, UNESP, Araraquara, Sao Paulo, Brazil
| | - V. S. Bolzani
- Departamento de Química Orgânica, Instituto de Química, UNESP, Araraquara, Sao Paulo, Brazil
| | - J. Belasque
- Departamento Científico, Fundecitrus, Araraquara, Sao Paulo, Brazil
| | - L. V. S. Sacramento
- Departamento de Princípios Ativos Naturais e Toxicologia, FCF, UNESP, Araraquara, Sao Paulo, Brazil
| | - H. Ferreira
- Faculdade de Ciências Farmacêuticas (FCF), Departamento de Ciências Biológicas, Universidade Estadual Paulista (UNESP), Araraquara, Sao Paulo, Brazil
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Valli M, Danuello A, Pivatto M, C. Saldana J, Heinzen H, Dominguez L, P. Campos V, R. Marqui S, C.M. Young M, Viegas Jr. C, H.S. Silva D, S. Bolzani V. Anticholinesterasic, Nematostatic and Anthelmintic Activities of Pyridinic and Pyrazinic Compounds. Curr Med Chem 2011; 18:3423-30. [DOI: 10.2174/092986711796504718] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 05/31/2011] [Indexed: 11/22/2022]
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de Oliveira AM, dos Santos AG, dos Santos RA, Csipak AR, Olivato C, da Silva IC, de Freitas MB, Bassi CL, Cavalheiro AJ, Bolzani VS, Silva DHS, Sakamoto-Hojo ET, Takahashi CS, Soares CP. Ethanolic extract of Casearia sylvestris and its clerodane diterpen (caseargrewiin F) protect against DNA damage at low concentrations and cause DNA damage at high concentrations in mice's blood cells. Mutagenesis 2009; 24:501-6. [DOI: 10.1093/mutage/gep034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Monteiro MCM, Leptokarydis IH, Silva GH, Silva VCD, Bolzani VS, Young MCM, Lopes MN. Constituintes químicos isolados dos caules de Michelia champaca L. (Magnoliaceae). Eclet Quím 2007. [DOI: 10.1590/s0100-46702007000300002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
O fracionamento cromatográfico da fase diclorometânica dos caules de Michelia champaca, forneceu quatro substâncias: álcool 4-O-beta-D-glicopiranosídeo sinapílico, aldeído 4-O-beta-D-glicopiranosídeo sinápico, siringaresinol e N-acetilnonaina. Extração ácido-base de uma nova porção do extrato bruto etanólico permitiu a identificação do alcalóide liriodenina. Os derivados fenilpropanoídicos e o alcalóide N-acetilnonaina estão sendo descritos pela primeira vez no gênero Michelia. O alcalóide liriodenina e a lignana siringaresinol apresentaram atividade antifúngica moderada.
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Affiliation(s)
| | | | - G. H. Silva
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil; Universidade Federal de Sergipe, Brasil
| | - V. C. da Silva
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | - V. S. Bolzani
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | | | - M. N. Lopes
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
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Abstract
Bioactivity-directed fractionation of the CH(2)Cl(2)/MeOH (2:1, v/v) extract of the roots of Petiveria alliacea, using mutant yeast strains of Saccharomyces cerevisiae and fungi Cladosporium cladosporioides and C. sphaerospermum led to the isolation of dipropyl disulphide (1), dibenzyl sulphide (2), dibenzyl disulphide (3), dibenzyl trisulphide (4), dibenzyl tetrasulphide (5), benzylhydroxymethyl sulphide (6) and di(benzyltrithio) methane (7). Of these, 5-7 are new compounds and this is the first report of the natural occurrence of 2 and 3.
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Affiliation(s)
- P J Benevides
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05599-970, SP, Brazil
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Abstract
A novel triterpene, viburgenin (1), has been isolated from an extract of the ripe fruit rinds of Rudgea viburnioides, together with the known saponins, arjunglucoside I and trachelosperosides B-1 and E-1, and the triterpenes trachelosperogenin B (2) and arjungenin. Compound 2 was previously obtained as a product from enzymatic hydrolysis, and it is reported for the first time as a natural product. The structure of compound 1 was determined as 2alpha,3beta, 19alpha,23,24-pentahydroxyurs-12-ene by extensive use of 1D and 2D NMR spectroscopic methods. Compound 1 exhibited moderate antifungal activity against Cladosporium cladosporioides.
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Affiliation(s)
- M C Young
- Seção de Fisiologia e Bioquímica de Plantas, Instituto de Botânica, CP. 4005, 01061-970, São Paulo, SP, Brazil
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