New triterpene and triterpenoid glycosides from Ilex brevicuspis

Abstract

From the leaves of Ilex brevicuspis were isolated a new triterpene, 20(S)-3β, 19α-dihydroxyurs-12-en-23, 28-dioic acid, named here brevicuspic acid, and two new triterpenoid glycosides, 3-O-α-Larabinopyranosyl-20(S)-pomolic acid-28-O-β-D-glucopyranosyl ester, named brevicuspisaponin 3, and the 23-sodium salt of (20S)3β, 19α, 24-trihydroxyurs-12-en-23, 28-dioic acid-28β-O-β-Dglucopyranosyl ester, along with the known compound 3-O-α-Larabinopyranosyl-20(S)-19α, 24-dihydroxyursolic acid- 28-O-β-Dglucopyranosyl ester, already described for Ilex argentina. Their structures were established on the basis of chemical and spectroscopic methods.