Two new stilbene glucosides [(+)-α-viniferin 13b-O-β-glucopyranoside and resveratrol 12-C-β-glucopyranoside] and two new resveratrol oligomers, hemsleyanols A and B, were isolated from the bark of Shorea hemsleyana along with four known reseveratrol oligomers. The structures of the isolates, including the relative configurations, were established by spectroscopic data involving long-range coupling and nuclear Overhauser effect experiments.
structure elucidation, stilbene, Shorea hemsleyana, Dipterocarpaceae, resveratrol oligomer
NCBI PubMed ID: 10923830Publication DOI: 10.1248/cpb.48.1001Journal NLM ID: 0377775Publisher: Pharmaceutical Society Of Japan
Institutions: Gifu Prefectural Institute of Health and Environmental Sciences, Kakamigahara, Japan, Herbarium Bogoriense, The Indonesian Institute of Science, Research and Development Center for Biology, Bogor, Indonesia
Methods: 13C NMR, 1H NMR, methylation, NMR-2D, FAB-MS, acid hydrolysis, UV, extraction, optical rotation measurement, acetylation, CC, HR-FAB-MS, PTLC, VLC
Found