Sesquiterpenoids from Pilea cavaleriei subsp. crenata.

Three new humulane-type sesquiterpenes, 8-O-(p-coumaroyl)-5beta-hydroperoxy-1(10)E,4(15)-humuladien-8alpha-ol (1), 8-O-(3-nitro-p-coumaroyl)-1(10)E,4(15)-humuladien-5beta,8alpha-diol (2) and 8-O-(p-coumaroyl)-1(10)E,4(5)E-humuladien-8-ol (3), and a new copaborneol derivative, 1-O-p-coumaroyl-copaborneol (4), have been isolated from the methanol extract of Pileacavaleriei Lévl. subsp. crenata C. J. Chen. Their structures were elucidated using spectroscopic methods. Cytotoxic and antimicrobial activities of the isolated compounds were evaluated.