[Phenolic compounds from Caesalpinia minax].

Fifteen compounds were obtained from the twigs and leaves of Caesalpinia minax. Their structures were identified as apigenin (1), 5,7,3',4'- tetrahydroxy-3-methoxyflavone (2), luteolin-5, 3 '-dimethyl-ether (3), thevetiaflavon (4), apigenin-7-O-beta-D-glucuronide (5), bonducellin (6), 7-hydroxy-3-( 4-hydroxybenzylidene )-chroman-4-one (7), 3-deoxysappanchalcone (8), 5-acetonyl-7-hydroxy-2-methyl chromone (9), 4-(trans)-acetyl-3,6,8-trihydroxy-3-methyl-dihydronaphthalenone (10), 4-(cis)-acetyl-3,6,8-trihydroxy-3-methyl-dihydronaphthalenone (11), vanillic acid (12), omega-hydroxypropioquaiacone (13), syringaresinol (14) and uracil (15). All compounds were isolated from C. minax for the first time. Compounds 1-14 were phenolic compounds and compounds 1-5, 9-13 and 15 were isolated from the genus Caesalpinia for the first time.