title: 5alpha-Ergost-24(28)-ene-3,6-dione - new steroid from the Pacific sponge Geodinella robusta.
abstract: A new diketosteroid, 5alpha-ergost-24(28)-ene-3,6-dione (1), has been isolated from the sponge Geodinella robusta. Its structure was determined by combined spectroscopic methods and chemical evidence.
authors.affiliation: Laboratory of the MaNaPro Chemistry, Pacific Institute of Bioorganic Chemistry, the Far East Division of the Russian Academy of Sciences, 690022 Vladivostok, Russia. shubina@piboc.dvo.ru
authors.forename: Larisa K
authors.initials: LK
authors.lastname: Shubina
authors.forename: Tatyana N
authors.initials: TN
authors.lastname: Makarieva
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Denisenko
authors.forename: Andrey S
authors.initials: AS
authors.lastname: Dmitrenok
authors.forename: Alla G
authors.initials: AG
authors.lastname: Guzii
authors.forename: Pavel S
authors.initials: PS
authors.lastname: Dmitrenok
authors.forename: Valentin A
authors.initials: VA
authors.lastname: Stonik
mesh_terms: D000818:Animals; D002942:Circular Dichroism; D004875:Ergosterol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D011161:Porifera / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D004875:Ergosterol