Two new sesquiterpenes from <i>Ainsliaea glabra</i>

Two new sesquiterpenes (<b>1</b> and <b>2</b>) together with seven known compounds (<b>3</b>-<b>9</b>) were isolated from the whole plant of <i>Ainsliaea glabra</i> Hemsl. The chemical structures were established elucidated by extensive spectroscopic analysis and comparison with the literature. All compound were tested for antimicrobial activity. Compound <b>8</b> exhibited anti-bacterial activity against <i>Staphylococcus aureus</i> with a MIC value of 25.0 μg/mL.