Combretene-A and B: Two new triterpenes from Combretum molle

Abstract

Two new lanosteriod type triterpenes have been isolated from the aerial parts of Combretum molle. Their structures have been established on the basis of spectral data as 3β,7α-dihydroxy lanost-5-ene, designated as combretene-A (1), and 3β-hydroxy-28-hydroxymethyl lanost-25(26)-ene, named as combretene-B (2). Previously reported compounds, such as a 1α-hydroxy cycloartenoid (mollic acid), and its 3α-L-arabinoside, 3β-D-xyloside and 3β-D-glucoside, have also been isolated from the plant.