One new galloyl glycoside from fresh leaves of Psidium guajava L

  • Yao Xue Xue Bao. 2010 Mar;45(3):334-7.
Ji-cheng Shu  1 ,  Gui-xin Chou ,  Zheng-tao Wang
Affiliations
  • 1. Institute of Chinese Materia Medica of Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines and SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, The Shanghai Key Laboratory for Compound Chinese Medicines, Shanghai 201203, China.
PMID: 21348423
Abstract

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.

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