One new galloyl glycoside from fresh leaves of Psidium guajava L
Shu, J.-c.; Chou, G.-x.; Wang, Z.-t.
Yao Xue Xue Bao 45(3): 334-337
2010
ISSN/ISBN: 0513-4870 PMID: 21348423 Document Number: 639880
To investigate the chemical constituents of Psidium Guajava L, the EtOH/H2O extract of the fresh leaves was subjected to various chromatography. Five constituents with galloyl moiety were isolated and elucidated as 1-O-(1, 2-propanediol)-6-O-galloyl-beta-D-glucopyranoside (1), gallic acid (2), ellagic acid (3), ellagic acid-4-O-beta-D-glucopyranoside (4) and quercetin-3-O-(6"-galloyl) beta-D-galactopyranoside (5) by spectroscopic methods, including 2D NMR and HR-ESI-MS spectrometry as well as by comparison with published data. Compounds 4 and 5 were obtained from P. guajava for the first time, and compound 1 is a new polyhydroxyl compound.