Four new triterpenoid saponins, named hookerosides A-D, were isolated from Pterocephalus hookeri. Based on chemical and spectral evidence, their structures were determined as 3-O-β-D-glucopyranosyl(1→4)-β-D-xylopyranosyl(1→3)-α-L-Rhamnopyranosyl(1→2)-β-D-xylopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl(1→6)-β-D-glucopyranoside, 3-O-β-D-xylopyranosyl(1→4)-β-D-glucopyranosyl(1→4)-β-D- xylopyranosyl(1→3)-α-L-rhamnopyranosyl(1→2)-β-D-xylopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl(1→6)-β-D-glucopyranoside, 3-O-α-L-rhamnopyranosyl(1→2)-β-D-xylopyranosyl(1→4)-β-D- glucopyranosyl(1→4)-β-D-xylopyranosyl(1→3)-α-L-rhamnopyranosyl(1→2)-β-D-xylopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl(1→6)-β-glucopyranoside and oleanolic acid 3-O-α-L-rhamnopyranosyl(1→2)-β-D- xylopyranosyl(1→4)-β-D-glucopyranosyl(1→4)-β-D-xylopyranosyl(1→3)-α-L-rhamnopyranosyl(1→2)-β-D-xylopyranoside, respectively.
triterpenoid saponins, Dipsacaceae, Pterocephalus hookeri, hookeroside A, hookeroside B, hookeroside C, hookeroside D
NCBI PubMed ID: 7763555Publication DOI: 10.1016/0031-9422(93)85174-PJournal NLM ID: 0151434Publisher: Elsevier
Institutions: Chengdu Institute of Biology, Academia Sinica, China, Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Kunming, China
Methods: 13C NMR, 1H NMR, gel filtration, partial acid hydrolysis, acid hydrolysis, PC, partial alkaline hydrolysis
Found