Feofitinas e esteróides glicosilados de Turnera subulata Sm. (TURNERACEAE)

Abstract

Turnera subulata Sm., popularly known as Chanana or flor-do-Guaruja , is a Brazilian medicinal plant belonging to the family Turneraceae. In Brazil this family is represented by two genera, Piriqueta and Turnera, being Turnera the most representative. The Genus Turnera is characterized by the presence of terpenoids, flavonoids, steroids, benzenoids, alkaloids and lipids. Aiming at contributing to the chemical profile of the family Turneraceae and considering the absence of data in literature about the chemical constitution of the species Turnera subulata, the latter was submitted to a phytochemical study to isolate its chemical constituents, through usual chromatographic methods, and after identifying them by means of spectroscopic methods such as IR and 1H and 13C NMR, with the add of two-dimensional techniques. Six constituents were isolated through this phytochemical study with Turnera subulata: Phaeophytin purpurin 18 phytyl ester (Ts-5); Phaeophytin (a) (Ts-1); 132- hydroxy - (132-S)- Phaeophytin (a) (Ts-2); Phaeophytin (b) (Ts-4) and mixture of steroids sitosterol-3- O-D-glucopyranoside and Stigmasterol-3-O-β-D-glucopyranoside (Ts-3).