Article
Constituents from stem barks of Luehea ochrophylla Mart and evaluation of their antiparasitic, antimicrobial, and antioxidant activities
Registro en:
ARAÚJO, Clinascia Rodrigues Rocha et al. Constituents from stem barks of Luehea ochrophylla Mart and evaluation of their antiparasitic, antimicrobial, and antioxidant activities. Natural Product Research, v. 31, n. 16, p. 1948-1953, 2017.
1478-6419
10.1080/14786419.2016.1266346
Autor
Araújo, Clinascia Rodrigues Rocha
Silva, Roqueline Rodrigues
Silva, Thiago de Melo
Takahashi, Jacqueline Aparecida
Sales Junior, Policarpo Ademar
Pinto, Nisia Andrade Villela Dessimoni
Fagundes, Elaine Maria de Souza
Romanha, Alvaro José
Murta, Silvane Maria Fonseca
Alcântara, Antônio Flávio de Carvalho
Resumen
Luehea species are found in almost all Central and South American countries. The present work describes the phytochemical study, isolation, and structural characterisation of friedelin, β-friedelinol, lupeol, pseudotaraxasterol, β-sitosterol, betulinic acid, taraxasterol, (-)-epicatechin, β-sitosterol-3-O-β-d-glucopyranoside, and (+)-epicatechin-(4β→8)-epicatechin from stem barks of Luehea ochrophylla Mart. The structural identification of the isolated compounds was mainly performed by NMR analyses and comparison with the data from literature. These compounds were isolated for the first time in the genus Luehea, except β-sitosterol glucopyranoside, (-)-epicatechin, and lupeol. Hexane extract (HE) and dichloromethane (DF) and ethyl acetate (AF) fractions exhibited antiparasitic activity against amastigote (intracellular) and trypomastigote culture forms of Trypanosoma cruzi. The ethanol extract (EE), DF, and ethanol fraction (EF) exhibited considerable antifungal activity against Candida albicans. Moreover, extracts and fractions exhibited significant percentage of capture free radicals of 2,2-diphenyl-picrylhydrazyl (DPPH) when compared to the standard of ascorbic acid. 2100-01-01