A new sesquiterpenoid glycoside from .

, known for the abundant bioactive components, is a precious traditional Chinese medicine. In this study, a novel guaiane sesquiterpenoid glycoside named (1, 5, 6, 7, 8, 11)-11, 13-dihydrodehydrocostuslactone-8--6'-2''()-butenoyl--D-glucopyranoside (), together with seven known compounds (-) were isolated from the dried aerial part of . Their structures were elucidated by spectroscopic and physico-chemical analyses. The antioxidant and anti-inflammatory activities of compound were investigated. And compound showed weak radical scavenging activity and low inhibitory activity on nitric oxide (NO) production.