Phytochemical investigation of the trunks from led to the isolation of a novel phenolic glucoside, 2-2,4-di-(3,4-dihydroxyphenyl)but-2-en-1-yl---D-glucopyranoside (), along with five known stilbene derivatives (). Their structures were determined mainly using high-resolution electrospray ionisation mass spectrometry and nuclear magnetic resonance spectroscopic analyses, followed by comparisons of observed spectral data with reported values. The novel compound in was found to be useful as a chemotaxonomic marker. Biological evaluation revealed that compound had remarkable inhibitory effects on nitric oxide production, with a half-maximal inhibitory concentration (IC) value of 4.85 ± 0.20 µM, which was much higher than that of the positive control dexamethasone (IC = 14.20 ± 0.54 M).
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