title: Antineoplastic agents; I. Three spirostanol glycosides from rhizomes of Dioscorea collettii var. hypoglauca.
abstract: By activity-guided fractionation, three known steroidal saponins, prosapogenin A of dioscin, dioscin and gracillin, were isolated from the total saponin fraction of Dioscorea coiletti var. hypoglauca as active compounds causing morphological abnormality of Pyricularia oryzae mycelia. The compounds also exhibited cytotoxic activity against the cancer cell line K562 in vitro. The structures of the compounds were elucidated on the basis of chemical evidence and IR, FAB-MS, 1H-NMR, 13C-NMR, and two-dimensional NMR (2D-NMR) analysis.
authors.affiliation: Department of Phytochemistry, Shenyang Pharmaceutical University, People's Republic of China.
authors.forename: K
authors.initials: K
authors.lastname: Hu
authors.forename: A
authors.initials: A
authors.lastname: Dong
authors.forename: X
authors.initials: X
authors.lastname: Yao
authors.forename: H
authors.initials: H
authors.lastname: Kobayashi
authors.forename: S
authors.initials: S
authors.lastname: Iwasaki
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004144:Diosgenin / Q000031:analogs & derivatives / Q000737:chemistry / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000494:pharmacology*; D008969:Molecular Sequence Data; D012503:Saponins / Q000737:chemistry / Q000494:pharmacology; D013150:Spirostans / Q000737:chemistry / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004365:Drugs, Chinese Herbal; D006027:Glycosides; D012503:Saponins; D013150:Spirostans; C044934:gracillin; C019357:dioscin; C026473:prosapogenin; D004144:Diosgenin