title: Cytotoxic oxygenated desmosterols of the red alga Galaxaura marginata.
abstract: Desmosterol (1), 24,25-epoxycholesterol (2), 24-hydroperoxycholesta-5,25-dien-3 beta-ol (3), 25-hydroperoxycholesta-5,23(E)-dien-3 beta-ol (4), cholesta-5,25-diene-3 beta,24-diol (5), and 24,25-epoxy-6 beta-hydroxycholest-4-en-3-one (7) were isolated from the marine red alga Galaxaura marginata; sterols 3, 4, and 7 were isolated for the first time from a natural source. Sterols 3-7 exhibited significant cytotoxicity toward several cancer cell lines.
authors.affiliation: Department of Marine Resources, National Sun Yat-Sen University, 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: C Y
authors.initials: CY
authors.lastname: Duh
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000302:isolation & purification* / Q000494:pharmacology*; D003897:Desmosterol / Q000031:analogs & derivatives / Q000302:isolation & purification* / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D000461:Rhodophyta / Q000737:chemistry*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D003897:Desmosterol