title: A new sesquiterpenoid from Saussurea lappa roots.
abstract: A new sesquiterpenoid, 10α-methoxyartemisinic acid (1) was isolated from Saussurea lappa roots along with two known compounds, costunolide (2) and dehydrocostus lactone (3) by high-speed countercurrent chromatography with purities of 85, 95 and 98%, respectively. Their structures were determined on the basis of spectral data including 1D and 2D NMR and HREIMS.
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.
authors.forename: Kun
authors.initials: K
authors.lastname: Cao
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Qian
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.|c International R&D center of Micro-nano Systems and New Materials Technology , Chongqing University , Chongqing , P.R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xu
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: a College of Chemistry and Chemical Engineering , Chongqing University , Chongqing , P.R. China.|b Defense Key Disciplines Lab of Novel Micro-nano Devices and System Techonlogy , Chongqing University , Chongqing , P.R. China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhang
mesh_terms: D003377:Countercurrent Distribution / Q000379:methods; D007783:Lactones / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D030441:Saussurea / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D007783:Lactones; D012717:Sesquiterpenes; C083030:dehydrocostus lactone; C002602:costunolide
keywords: 10-methoxy-artemisinic acid; HSCCC; Saussurea lappa roots; a new sesquiterpene