Novel benzil and isoflavone derivatives from Millettia dielsiana.

The analysis of vine stem extract from MILLETTIA DIELSIANA Harms yielded a novel benzil ( 1) and five new prenylated isoflavones ( 2 - 6) together with three known isoflavones ( 7 - 10) and one known flavone ( 11), and their structures were elucidated on the basis of chemical and spectral analysis. The absolute configuration of the 3'',4''-diols in 6 was determined by observing the CD induced after addition of dimolybdenum tetraacetate in DMSO solution (Snatzke's method). Some isolates were tested for their anti-inflammatory and antithrombase activities and cytotoxicities. Compound 2, barbigerone, and genistein showed significant anti-inflammatory activity, with inhibitory ratios 59.1 %, 59.5 %, and 58.5 %, respectively, at 10 muM, while compound 4 exhibited moderate cytotoxicity.