title: Minor and trace sterols in marine invertebrates. Isolation and structure elucidation of 24-methyl-5 alpha-cholesta-7,9(11), 24(28)-trien-3 beta-ol, the first naturally occurring delta 7,9(11) unsaturated marine sterol.
mesh_terms: D000818:Animals; D002782:Cholestenes / Q000032:analysis / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D011161:Porifera / Q000032:analysis*
chemical_list: D002782:Cholestenes; C037006:24-methylcholesta-7,9(11),24(28)-trien-3-ol