关键词: 滇藏杜英, 化学成分, 分离, 结构鉴定

Abstract: The chemical components of Elaeocarpus braceanus were extracted using organic solvent extraction.Column chromatography led to the isolation of 17 compounds.Combination of the 1D, 2D NMR and mass spectrometry,all compounds were identified as 3-amino-4-hydroxybenzoate-1-O-β-D-Xylopyranoside (1), 3,5,7-trihydroxy-4′-methoxyflavone (2),myricetin (3),5-O-methyl-myricetin (4),4′-O-methyl-myricetin (5),3,5,7,4′-tetrahydroxy-2,3-dihydroflavone (6),dihydromyricetin (7),myricetin 3-O-α-L-rhamnopyranoside (8),Kaempferol-3-O-α-L-rhamnoside (9),4′-O-methyl-myricetin 3-O-α-L-rhamnoside (10),7,4′O-dimethyl-myricetin 3-O-α-L-rhamnoside (11),4′-O-methyl-myricetin 3-O-β-D-glucoside (12),Kaempferol 3-O-β-D-glucoside (13),(3β,9β,10α,16α,23R)-16,23-epoxy-3-(β-D-glucopyranosyloxy)-20-hydroxy-9-methyl-19-norlanosta-5,24-dien-11-one (14),β-sitosterol (15),daucosterol (16),3,5-dihydroxy-4-methoxybenzoic acid (17).Additionally,1 was a new compound,and other 16 compounds were firstly isolated from the titled plant.

Key words: Elaeocarpus braceanus, chemical constituents, separation and isolation, structural elucidation