Chemical Constituents from Garcinia Bracteata and Ultra Performance Liquid Chromatography/Mass Spectrometry Guided Isolation of Tautomers

doi:A

Abstract

Abstract: Eleven compounds have been isolated from the twigs of Garcinia bracteata. Their structures were identified on the basis of spectroscopic analysis and chemical evidence: neobractatin (1), brasixanthone B (2), 5-O-methylxanthone V1 (3), 10-O-methylmacluraxanthone (4), isobractatin (5), xanthone V1 (6), xerophenone A (7), xerophenone B (8), bractatin (9), macluraxanthone (10) and 3-O-methylneobractatin (11). Tautomers (7) and (8) were firstly confirmed on the basis of Ultra Performance Liquid Chromatography/Mass Spectrometry (UPLC/MS). Among them, compounds 6-8 were isolated from G. bracteata for the first time.

Key words: Garcinia bracteata, chemical constituent, prenylated xanthone, tautomers, UPLC analysis

CLC Number:

R284.2

FAN Qing-fei, NA Zhi, HU Hua-bin, XU You-kai, TANG Ting. Chemical Constituents from Garcinia Bracteata and Ultra Performance Liquid Chromatography/Mass Spectrometry Guided Isolation of Tautomers[J]. NATURAL PRODUCT RESEARCH AND DEVELOPMENT, 2012, 23(8): 1055-.

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