Trojanosides I-K : New Cycloartane-Type Glycosides from the Aerial Parts of Astragalus trojanus

概要

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Three new cycloartane-type triterpene glycosides have been isolated from the aerial parts of Astragalus trojanus. The structures were established mainly by a combination of one- and two-dimensional NMR techniques [^1H-^1H-correlation spectroscopy (COSY), ^1H-^<13>C-heteronuclear multiple quantum correlation spectroscopy (HMQC), and ^1H-^<13>C-heteronuclear multiple-bond correlation spectroscopy (HMBC)] and high resolution electrospray ionization mass spectrometry (HR-ESI-MS) as 3-O-β-(2', 3' -di-O-acetyl)-D-xylopyranosyl-6-O-β-D-glucopyranosyl-16-O-acetoxy-20(R), 24(S)-epoxycycloartane-3β, 6α, 16β, 25-tetrol, 3-O-[α-L-rhamnopyranosyl-(1→2)-β-(3', 4'-di-O-acetyl)-D-xylopyranosyl]-6-O-β-D-xylopyranosyl-20(R), 24(S)-epoxycycloartane-3β, 6α, 16β, 25-tetrol, 3-O-β-D-xylopyranosyl-6, 16-di-O-β-D-glucopyranosyl-20(R), 24(S)-epoxycycloartane-3β-, 6α, 16β, 25-tetrol.
公益社団法人日本薬学会の論文
2001-11-01