Two new sesquiterpene aryl esters from 012m.

Two new sesquiterpene aryl esters, armimelleolides A and B ( and ), and four known ones, were isolated from the EtOAc extract of 012 m by column chromatography on silica gel, reversed-phase C silica gel and semi-preparative HPLC. Their structures were elucidated on the basis of spectroscopic methods, including extensive 1 D NMR, 2 D NMR and MS. All these compounds showed potential antitumor activities against at least one of the human cancer cell lines (A549, HCT-116, M231 and W256), with IC ranging from 2.