From the root bark of Salacia prinoides DC. (Celastraceae), six closely related triterpenes, P, Q, R, S, T and V have been isolated. These have been shown to be 1,3-diketofriedelane derivatives. The structures of these compounds, 1, 10, 39, 33, 11 and 12, have been established on the basis of spectroscopic as well as degradative evidence.
Triterpenes from <i>Garcia parviflora.</i> Cytotoxic Evaluation of Natural and Semisynthetic Friedelanes
作者:Blanca M. Reyes、María Teresa Ramírez-Apan、Rubén A. Toscano、Guillermo Delgado
DOI:10.1021/np100440p
日期:2010.11.29
Three new friedelane-type triterpenes, 1,2-dehydro-2,3-secofriedelan-3-oic acid (1), 1β-hydroxyfriedelin (2), and 3β-hydroxyfriedelan-23-oic acid (3), and the known compounds friedelin-3,4-lactone (4), acetyl aleuritolic acid (5), 4-hydroxy-5-propionyl-1,3-di-O-methylpyrogallol, elemicin, and (—)-syringaresinol were isolated from the leaves of Garcia parviflora. The structures of 1−3 were elucidated