A New Stilbene from Cercis chinensis Bunge

To study new natural products, we used ODS (YMC, Kyoto, Japan) and silica gel columnchromatography to separate compounds in Cercis chinensis Bunge (Leguminosae). A new stilbene, trans-3, 5, 3', 4'-tetrahydroxy-4-methylstilbene (1), along with 10 known compounds, namely piceatannol (2),dihydromyricetin (3), catechin (4), dihydrorobinetin (5), menisdaurin (6), lithospermoside (7), teatannin (8),dasycarponin (9), β-sitosterol (10), and daucosterin (11), was isolated from C. chinensis. Their structureswere elucidated on the basis of spectroscopic evidence. Compounds 2-6 and 9 were isolated from thegenus Cercis Linn. for the first time.