title: Minor and trace sterols in marine invertebrates 65. 23-Epidihydrocalysterol: a new cyclopropane-containing sponge sterol.
abstract: A new cyclopropane-containing sterol was isolated from the marine sponge Cribrochalina vasculum. The new sterol was characterized by nuclear magnetic resonance and mass spectrometry and the structure was shown to be (23R,24S,28R)-dihydrocalysterol. Implications concerning the biosynthesis of cyclopropane and cyclopropene sterols in sponges are discussed.
authors.affiliation: Department of Chemistry, Stanford University, California 94305.
authors.forename: J L
authors.initials: JL
authors.lastname: Giner
authors.forename: C
authors.initials: C
authors.lastname: Djerassi
mesh_terms: D000818:Animals; D003521:Cyclopropanes / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D003521:Cyclopropanes; D013261:Sterols; C077597:23-epidihydrocalysterol; C030797:cyclopropane