New triterpene glycosides fromThalictrum squarrosum St. ex Willd. The structure of squarrosides B3 and B4

• DOI: 10.1007/bf01434236
• Publication Date: 2005-04-12T01:09:26Z
• Authors: E. A. Khamidullina; A. S. Gromova; V. I. Lutsky; S. B. Zinchenko; A. A. Semenov
• Keywords: 01 natural sciences; 0104 chemical sciences

From the above-ground part ofThalictrum squarrosum St. ex Willd. (Ranunculaccae), an equilibrium mixture of two triterpene glycosides, squarrosidc B3 (1), 3-O-[O-(α-L-rhamno-pyranosyl)-(1←6)-β-D-glucopyranosyl]-21 (S),22(ɛ),23(R)-3β,21,22,30-tctralmydroxy-21, 23-cpoxycycloartlt-24-ene, and squarrosidc B4 (2), its 21(R) epimer, was isolated. Their structures were established on the basis of IR and 2D NMR spectra and FAB mass spectra.