Notes
Trojanosides I—K: New Cycloartane-Type Glycosides from the Aerial Parts of Astragalus trojanus
2001 Volume 49 Issue 11 Pages 1482-1486
Details
2001 Volume 49 Issue 11 Pages 1482-1486
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-13C-heteronuclear multiple quantum correlation spectroscopy (HMQC), and 1H-13C-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.
