Research Information System
Phytochemistry Letters, vol.21, pp.128-133, 2017 (SCI-Expanded)
Four new oleanane-type triterpene glycosides namely 3-O-[β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranosyl-(1 → 2)-α-L-arabinopyranosyl] oleanolic acid, 3-O-[β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranosyl-(1 → 2)-α-L-arabinopyranosyl]-28-O-[α-L-rhamnopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranosyl] oleanolic acid, 3-O-[β-D-quinovopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl]-28-O-[β-D-glucopyranosyl] oleanolic acid, 3-O-[β-D-quinovopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl]-28-O-[α-L-rhamnopyranosyl(1 → 4)-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranosyl] oleanolic acid, were isolated from methanol extract of the roots of Nigella arvensis var. involucrata along with five known oleanane-type triterpene glycosides and a steroid glucoside. Structures of the new compounds were established as by using 1D and 2D NMR techniques and mass spectrometry.