Abstract:To investigate the chemical constituents of Dalbergia cochinchinensi, five neoflavonoids and seven other compounds were isolated from its heartwood by various methods, such as organic solvent extraction, fractionation and chromatographic separation techniques. Based on physical and chemical properties and spectral data, their structures were identified as 7-hydroxy-2',3',4'-trimethoxyisoflavan (1), 6,4'-dihydroxy-7-methoxy-flavan (2), R-dalbergiphenol (3), R-4-methoxydalbergione (4), mimosifoliol (5), R-5-O-methyllatifolin (6), R-latifolin (7), maackiain (8), secundiflorol Ι (9), 3,9-dimethoxy-6H-benzofufo[3,2-c]chromen-6-one (10), muco-dianin C (11), lup-(20)29-ene-2α,3α-diol (12). Compounds 1, 5 and 8-12 were isolated from D. cochinchinensi for the first time.