title: Ypsilandrosides C-G, five new spirostanol saponins from Ypsilandra thibetica.
abstract: A further phytochemical investigation on the whole plants of Ypsilandra thibetica yielded one sapogenin and 12 spirostanol saponins. Five of these are new compounds, designated as ypsilandrosides C-G (2-6). Their structures were determined by detailed spectroscopic analysis, including extensive 1D and 2D NMR data, and by the result of a hydrolytic reaction. Compounds 2-5 were rare steroidal saponins that an apiofuranosyl unit was directly linked at C-3 of the aglycone. Selected spirostanol saponins (2-6, 9) were tested for their cytotoxic activities against K562, SPC-A-1, BGC-823, Eca-109, and AGS cell lines. Compounds 6 and 9 showed moderate inhibitory activity against all five cell lines. The antifungal properties of the new spirostanol saponins (2-6) against Candida albicans were also determined.
authors: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China.
authors: Bai-Bo
authors: BB
authors: Xie
authors: Hai-Yang
authors: HY
authors: Liu
authors: Wei
authors: W
authors: Ni
authors: Chang-Xiang
authors: CX
authors: Chen
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D045744:Cell Line, Tumor; D006801:Humans; D019684:Magnoliopsida / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013150:Spirostans / Q000737:chemistry*
chemical_list: D000935:Antifungal Agents; D000970:Antineoplastic Agents; D012503:Saponins; D013150:Spirostans; C545873:ypsilandroside C; C545874:ypsilandroside D; C545875:ypsilandroside E; C545876:ypsilandroside F; C545877:ypsilandroside G