Journal
PHYTOCHEMISTRY
Volume 69, Issue 5, Pages 1279-1286Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2007.11.014
Keywords
Eriocaulon buergerianum; eriocaulaceae; xanthone; flavonoid; naphthopyranone; antibacterial activity; staphylococcus aureus (ATCC 25-923)
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Five phenolic components, 1, 3,6-trihydroxy-2,5,7-trimethoxyxanthone (1), 7,3'-dihydroxy-5,4',5'-trimethoxyisoflavone (2), toralactone-9- O-beta-D-glucopyranoside (3), patuletin-3-O-[2-O-E-feruloyl-beta-D-glucopyranosyl-(1 -> 6-p-D-glucopyranoside] (4), patuletin-3-O-[beta-D-glucopyranosyl-(l 1 -> 3)-2-O-E-caffeoyl-beta-D-glucopyranosyl-(1 -> 6)-beta-D-glucopyranoside] (5), along with 19 known compounds were isolated from Eriocaulon buergerianum (Eriocaulaceae). Their structures were determined by spectroscopic and chemical methods. All 24 isolated compounds were tested against the pathogenic bacteria Staphylococcus aureus (ATCC 25923); as a result, 10 compounds were found to exhibit antibacterial activity with MICs ranging from 32 to 256 mu g/ml. (c) 2007 Elsevier Ltd. All rights reserved.
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