title: Four new terpenoids from the roots of Ligularia narynensis.
abstract: Four new oplopane and guaiane type sesquiterpenoids (1-3), and a monoterpenoid (4) together with three known monoterpenoids (5-7), have been isolated from the roots of Ligularia narynensis. The structures of 1-4 were elucidated as 3beta,4-diacetoxy-8alpha-(2-methylbutyryloxy)-9alpha-(4-methylsenecioyloxy)-11alpha,12-epoxyoplop-10 (14)-ene (1), 3beta,4-diacetoxy-9alpha-(4-acetoxy-4-methylsenecioyloxy)-2beta,8alpha-di (2-methylbutyryloxy)-11alpha,12-epoxyoplop-10 (14)-ene (2), 2alpha-hydroxy-1betaH,7alphaH,10alphaH-guai-4,11 (12)-dien-3-one (3) and 1alpha,2beta,3alpha,6alpha-tetrahydroxy-p-menthane (4) by spectroscopic methods. 1 and 2 were evaluated for their in vitro cytotoxic activity against cultured SMMC-7721 (human hepatoma), L02 (human hepatocyte), and HL-60 (human promyelocytic leukaemia) cell lines.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Gao
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Xie
authors.forename: Zhong-Jian
authors.initials: ZJ
authors.lastname: Jia
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology; D019659:Asteraceae / Q000737:chemistry*; D045744:Cell Line, Tumor; D006801:Humans; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D013729:Terpenes