title: Constituents of the root bark of Severinia buxifolia collected in Hainan.
abstract: Two new tetranortriterpenoids, 7-isovaleroylcycloseverinolide (1) and 7-isovaleroylcycloepiatalantin (2), together with 28 known compounds, were isolated and characterized from the root bark of Severinia buxifolia collected in Hainan. The structures of 1 and 2 were elucidated on the basis of spectral evidence including 2D NMR and X-ray techniques. The cytotoxicity of several acridone alkaloid isolates (3-8) was evaluated against a small tumor cell panel.
authors.affiliation: Department of Chemistry, National Cheng Kung University, Tainan, Taiwan, 701, Republic of China. tswu@mail.ncku.edu.tw
authors.forename: T S
authors.initials: TS
authors.lastname: Wu
authors.forename: C M
authors.initials: CM
authors.lastname: Chen
authors.forename: F W
authors.initials: FW
authors.lastname: Lin
mesh_terms: D000166:Acridines / Q000737:chemistry / Q000494:pharmacology; D054831:Acridones; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006528:Carcinoma, Hepatocellular; D003110:Colonic Neoplasms; D018360:Crystallography, X-Ray; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006801:Humans; D007624:KB Cells; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013624:Taiwan; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
chemical_list: C436348:7-isovaleroylcycloepiatalantin; C436347:7-isovaleroylcycloseverinolide; D000166:Acridines; D054831:Acridones; D000972:Antineoplastic Agents, Phytogenic; D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C041300:acridone