Triterpenes and triterpene glycosides from Paradrymonia macrophylla

Abstract

Seven pentacyclic triterpenes and triterpene glycosides have been isolated from the stems and roots of Paradrymonia macrophylla and their structures elucidated by means of 1H and 13C NMR spectroscopy. Three of them are described for the first time as natural products, namely: 2α,3β,19α-trihydroxy-24-oxo-urs-12-en-28-oic acid (24-epi-pinfaensic acid), 2α,3β,19α-trihydroxy-24-oxo-urs-12-en-28-oic acid ester glucoside (24-epi-pinfaensin) and 2α,3β,19α-trihydroxy-24-oxo-olean-12-en-28-oic acid ester glucoside (paradrymonoside).