Antimicrobial phenylpropanoids from Piper sarmentosum

Abstract One new and three known phenylpropanoids have been isolated from the leaves of Piper sarmentosum . They are 1-allyl-2,6-dimethoxy-3,4-methylenedioxybenzene, 1-allyl-2,4,5-trimethoxybenzene, 1-(1- E -propenyl)-2,4,5-trimethoxybenzene and 1-allyl-2-methoxy-4,5-methylenedioxybenzene. The new compound showed antimicrobial activity against Escherichia coli and Bacillus subtilis .