论文部分内容阅读
A new triterpene and a saponin, named 2α,3β,23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester (2), have been isolated from the aerial part of Centella asiatica. Their structures were elucidated by spectral methods, including 2D-NMR spectra.