title: Terpenoids and sterols from Saussurea cauloptera.
abstract: A total of 27 natural products were isolated from Saussurea cauloptera, including two new eudesmane-type sesquiterpenoids, the gerin derivatives 2 and 3, and one new ent-labdane diterpenoid, compound 9. The known compounds included six sesquiterpenoids, eleven triterpenoids, six sterols, and one lignan. Their structures were elucidated on the basis of extensive spectroscopic and mass-spectrometric analyses, as well as by X-ray crystallography in the case of gerin (1). The structurally related compounds 1-4 were found to exhibit strong inhibitory activities against human gastric carcinoma (SGC-7901) cells.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Xiu-Ran
authors.initials: XR
authors.lastname: Wang
authors.forename: Quan-Xiang
authors.initials: QX
authors.lastname: Wu
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Shi
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D018360:Crystallography, X-Ray; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D006367:HeLa Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008958:Models, Molecular; D008968:Molecular Conformation; D012015:Reference Standards; D030441:Saussurea / Q000737:chemistry*; D045787:Sesquiterpenes, Eudesmane / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D013237:Stereoisomerism; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D045787:Sesquiterpenes, Eudesmane; D013261:Sterols; D013729:Terpenes