title: Nor-lignans and steroidal saponins from Asparagus gobicus.
abstract: From the roots of Asparagus gobicus, four new nor-lignans, 3'-methoxynyasin, iso-agatharesinol, gobicusins A, B and one new steroidal saponin, 3-O-[beta-D-xylopyranosyl(1-4)-beta-D-glucopyranosyl(1-2)-beta-D-glucopyranosyl]-(25S)-5beta-spirostan-3beta-ol (11) were isolated, together with twelve known compounds. The structures of the new compounds were established by spectroscopic methods including 2D-NMR techniques (1H-1H COSY, HMBC, HMQC) and chemical transformations. Nyasol (5) and 11 exhibited remarkable in vitro cytotoxic activity against cultured HO-8910 (human ovarian carcinoma) and Bel-7402 (human hepatoma) cells with IC50 vales of 30.6 and 29.4 microM, 5.2 and 5.2 microM, respectively.
authors.affiliation: College of Chemistry and Chemical Engineering, National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, PR China.
authors.forename: Cai-Xia
authors.initials: CX
authors.lastname: Yang
authors.forename: Shuang-Shen
authors.initials: SS
authors.lastname: Huang
authors.forename: Xiu-Ping
authors.initials: XP
authors.lastname: Yang
authors.forename: Zhong-Jian
authors.initials: ZJ
authors.lastname: Jia
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D027761:Asparagus Plant; D045744:Cell Line, Tumor / Q000187:drug effects; D006801:Humans; D020128:Inhibitory Concentration 50; D017705:Lignans / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D018517:Plant Roots; D012503:Saponins / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D017705:Lignans; D010936:Plant Extracts; D012503:Saponins