Acylphloroglucinols from the fern Elaphoglossum lindbergii

Abstract

Four new acylphloroglucinols have been isolated from a diethyl ether extract of the rhizomes and roots of the fern Elaphoglossum lindbergii. Their structures were elucidated by extensive analysis of spectroscopic data and comparison with those previously reported for other Elaphoglossum and Dryopteris acylphloroglucinols . These compounds showed mild antibacterial activity and altered biofilm formation of the Gram (+) bacterium Staphylococcus aureus at 100 ug/ml