[Studies on the chemical constituents of Xanthoceras sorbifolia].

Objective: To study the chemical constituents of Xanthoceras sorbifolia for explaining the active compounds.

Methods: The constituents were isolated by silica gel column chromatography. Sephadex LH-20, MCI et al and the LC-MS-MS, 1H-NMR, 13C-NMR, CD spectroscopic analysis were employed for the structure identification.

Results: 9 compounds were obtained and their structures were identified as (2R, 3R)-dihydromyricetin (I), myricetin (II), quercetin (III), (2R, 3S)-catechin (IV), gallocatechin (V), (2R, 3R)-3,3',5,5',7-pentahydroxyflavanone (VI), (2S) -3',4',5,5',7-pentahydroxyflavanone (VII), (-) epigallocatechin (VIII) , proanthocyanidin A2 (IX).

Conclusion: Compound I, IV, VI, VII are isolated from xanthoceras genus for the first time.