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  • Title: Minor and trace sterols in marine invertebrates 65. 23-Epidihydrocalysterol: a new cyclopropane-containing sponge sterol.
    Author: Giner JL, Djerassi C.
    Journal: Steroids; 1992 Jun; 57(6):258-61. PubMed ID: 1440695.
    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.
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