Volume 51 (2003) Issue 5 Pages 574-578
Four new triterpenoid saponins, designated as stelmatotriterpenosides E—H (1—4), together with three known compounds, asterbatanoside B (5), 2α,3β,19α,23-tetrahydroxy-olean-12-en-28-oic acid-3-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl ester (6) and 2α,3β,19α,23-tetrahydroxy-urs-12-en-28-oic acid-3-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl ester (7), were isolated from the stems of Stelmatocrypton khasianum. On the basis of chemical and spectral evidence, the structures of 1—4 were established as 2α,3β,23-trihydroxy-olean-12-en-28-oic acid-3-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (1), 2α,3β,23-trihydroxy-urs-12-en-28-oic acid-3-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (2), 2α,3β,19α-trihydroxy-urs-12-en-28-oic acid-3-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl ester (3), and 2β,3β,19α-trihydroxy-urs-12-en-24,28-dioic acid-24-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl diester (4).