title: A new cytotoxic sterol methoxymethyl ether from a deep water marine sponge Scleritoderma sp. cf. paccardi.
abstract: 24(R)-Methyl-5 alpha-cholest-7-enyl 3 beta-methoxymethyl ether (1), a new sterol ether, has been isolated from a deep-water marine sponge Scleritoderma sp. cf. paccardi. Compound 1 exhibited in vitro cytotoxicity against the cultured murine P-388 tumor cell line with an IC50 of 2.3 micrograms/mL. The isolation and structure elucidation of 1 by NMR spectroscopy is described.
authors.affiliation: Division of Biomedical Marine Research, Harbor Branch Oceanographic Institution, Inc., Fort Pierce, Florida 34946, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Gunasekera
authors.forename: M
authors.initials: M
authors.lastname: Kelly-Borges
authors.forename: R E
authors.initials: RE
authors.lastname: Longley
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000302:isolation & purification* / Q000633:toxicity*; D002782:Cholestenes / Q000302:isolation & purification* / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D004354:Drug Screening Assays, Antitumor; D004987:Ethers / Q000302:isolation & purification* / Q000494:pharmacology; D007941:Leukemia P388 / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D011161:Porifera / Q000737:chemistry*
chemical_list: C102772:24-methylcholest-7-enyl 3-methoxymethyl ether; D000970:Antineoplastic Agents; D002782:Cholestenes; D004987:Ethers