New Triterpenoid Saponins from Stelmatocrypton khasianum

概要

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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-ο-β-D-glucopy-ranosyl-28-ο-β-D-glucopyranosyl ester (6) and 2α,3β,19α,23-tetrahydroxy-urs-12-en-28-oic acid-3-ο-β-D-glucopyranosyl-28-ο-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-trihydroxyolean-12-en-28-oic acid-3-ο-β-D-glucopyranosyl-28-ο-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (1), 2α,3β,23-trihydroxy-urs-12-en-28-oic acid-3-ο-β-D-glucopyranosyl-28-ο-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (2), 2α,3β,19α-trihydroxy-urs-12-en-28-oic acid-3-ο-β-D-glucopyranosyl-28-ο-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl ester (3), and 2β,3β,19α-trihydroxy-urs-12-en-24,28-dioic acid-24-ο-β-D-glucopyranosyl-28-ο-β-D-glucopyranosyl diester (4).
公益社団法人日本薬学会の論文
2003-05-01