Chemical constituents isolated from turnera subulata Sm. and electrochemical characterization of phaeophytin b

• Main Author: Brito Filho,Severino Gonçalves de
• Publication Date: 2014
• Other Authors: Fernandes,Marianne Guedes, Chaves,Otemberg Souza, Chaves,Maria Célia de Oliveira, Araruna,Felipe Bastos, Eiras,Carla, Leite,José Roberto de Souza de Almeida, Agra,Maria de Fátima, Braz-Filho,Raimundo, de Souza,Maria de Fátima Vanderlei
• Format: Article
• Language: eng
• Source: Química Nova (Online)
• Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000400005
• topic: Turneroideae; Turnera subulata; Phaeophytins

Turnera subulata Sm., known as "Chanana" or "flor-do-Guarujá" in Brazilian folklore, is a plant species belonging to the subfamily Turneroideae of family Passifloraceae, which is used for various medicinal purposes in Brazil. The phytochemical study conducted here led to the isolation and identification of ten compounds present in T. subulata: two mixtures of steroids, sitosterol and stigmasterol (nonglycosylated and glycosylated); a mixture of flavonoids, 5,7,4′-trihidroxiflavona-8-C-α-glucopyranoside and 5,7,3′,4′-tetrahidroxiflavona-8-C-α-glucopyranosidel; and four phaeophytins, phaeophytin purpurin-18-phytyl ester, a rare natural product, phaeophytin a , 13²-hydroxy-(13²-S)-phaeophytin a , and phaeophytin b Phaeophytin b exhibited electrochemical activity similar to that of phthalocyanines.