Saponins from Harpulla cupanioides

Five new saponins have been isolated from the stem bark of Harpullia cupani oides and identified as 3-O-beta-D-glucopyranosyl(1 --> 2)[alpha-L-rhamnopy ranosyl(1 --> 3)] beta-D-glucuronopyranosyl 22-O-angeloyl-A1-barrigenol, 3- O-beta-D-glucopyranosyl( 1 --> 2)[alpha-L-rhamnopyranosyl( 1 --> 3)] beta-D -glucuronopyranosyl 28-O-angeloyl-A1-barrigenol, 3-O-beta-D-galactopyranosy l(1 --> 2)[alpha-L-rhamnopyranosyl(1 --> 3)] beta-D-glucuronopyranosyl 28-O -angeloyl-A1-barrigenol, 3-O-beta-D-galactopyranosyl( 1 --> 2)[alpha-L-rham nopyranosyl( 1 --> 3)] beta-D-glucuronopyranosyl 16-O-beta,beta-dimethylacr yloyl-camelliagenin A and :3-O-beta-D-glucopyranosyl(1 --> 2)[alpha-L-rhamn opyranosyl(1 --> 3)] beta-D-glucuronopyranosyl 28-O-angeloyl-camelliagenin A. The structures were elucidated by analysis of 2D-NMR spectra and mass sp ectra. (C) 1998 Elsevier Science Ltd. All rights reserved.