Triterpene glycosides of Thalictrum squarrosum. IV. Structures of squarrosides A1, A2, B1, and B2 |
| |
Authors: | E A Khamidullina A S Gromova V I Litskii A L Vereshchagin A A Semenov M F Larin |
| |
Abstract: | Four new cycloartane glycosides have been isolated from a methanolic extract ofThalictrum squarrosum Stephan ex Willd.: squarroside A1 (I) — (21R, 22S, 23R)-3β-(β-D-glucopyranosyloxy)-21α-methoxy-21,23-epoxycycloart-24-ene-22β,30-diol,
C30H60O10; squarroside A2 (II) — the (21S)-epimer of compound (I); squarroside B1 (III) (21R, 22S, 23R)-3gb-O-α-L-rhamnopyranosyl-(1
→ 6)-β-D-glucopyranosyloxy]-21α-methoxy-21,23-epoxycycloart-24-ene-22β,30-diol, C43H70O14; and squarroside B2 (IV) — the (21S)-epimer of compound (III). The proposed structures were determined on the basis of1H and13C NMR spectroscopy, FAB mass spectrometry, and chemical transformations.
Irkutsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii,
No. 4, pp. 516–523, July–August, 1989. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|