Monoterpenoid glycosides from ligustrum robustum

Eight new monoterpenoid glycosides named ligurobustosides A, B, C, E, F, I, J and K were isolated from the leaves of Ligustrum robustum. Their structures were established as geraniol (3'-O-alpha-L-rhamnopyranosyl-beta-D-glucopyranoside), geraniol (3'-O-alpha-L-rhamnopyranosyl-4'-caffeoyl-beta-D-glucopyranoside), geraniol (3'-O-alpha-L-rhamnopyranosyl-4'-p-coumaroyl-beta-D-glucopyranoside), geraniol (3'-O-alpha-L-rhamnopyranosyl-6'-O-p-coumaroyl-beta-D-glucopyranoside), 6-hydroxy-3:7-dimethyl-2E,7-octadienyl-(3'-O-alpha-L-rhamnopyranosyl-6'-O-p-coumaroyl-beta-D-glucopyranoside), 7-hydroxy-3,7-dimethyl-2E,5E-octadienyl-(3'-O-alpha-L-rhamnopyranosyl-4'-O-p-coumaroyl)-beta-D-glucopyranside), geraniol-[(3 "-O-alpha-L-rhamnopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl)-(4'-O-p-coumaroyl-beta-D-glucopyranoside], 6,7-dihydroxy-3,7-dimethyl-2E-octadienyl-(3'-O-alpha-L-rhamnopyranosyl-4'-O-p-coumaroyl-beta-D-glucopyranoside) respectively, by spectroscopic and chemical methods. (C) 1998 Elsevier Science Ltd. All rights reserved.