title: Study on cytotoxic oxygenated desmosterols isolated from the red alga Galaxaura marginata.
abstract: Four novel oxygenated desmosterols, 24 zeta-hydroperoxy-6 beta-hydroxycholesta-4,25-dien-3-one (1), 25-hydroperoxy-6 beta-hydroxycholesta-4,23(E)-dien-3-one (2), 24 zeta-hydroperoxycholesta-4,25-diene-3,6-dione (3), and 25-hydroperoxycholesta-4,23(E)-diene-3,6-dione (4) were isolated from the marine red alga Galaxaura marginata. Steroids 1-4 and three synthetic oxygenated desmosterols 5-7 were shown to exhibit significant cytotoxicity against several cancer cell lines.
authors.affiliation: Department of Marine Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan, Republic of China.
authors.forename: J H
authors.initials: JH
authors.lastname: Sheu
authors.forename: S Y
authors.initials: SY
authors.lastname: Huang
authors.forename: G H
authors.initials: GH
authors.lastname: Wang
authors.forename: C Y
authors.initials: CY
authors.lastname: Duh
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006801:Humans; D007624:KB Cells; D007941:Leukemia P388 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000461:Rhodophyta / Q000737:chemistry*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D010840:Phytosterols