title: Marine sterols. VIII. Isolation and structure of sarcosterol, a new sterol with a delta17(20)-double bond from the soft coral Sarcophyton glaucum.
abstract: The sterol mixture of the southern Japan's soft coral, Sarcophyton glaucum, was found to contain 11 sterols including a novel sterol, 23,24 xi-dimethylcholesta-5,22-dien-3 beta-ol and a new diunsaturated C29 sterol. 22,23-Dihydrobrassicasterol and gorgosterol were the major components in free- and esterified sterols respectively. Brassicasterol was found in S. glaucum, in contrast to the ubiquity of 24-epibrassicasterol in the marine invertebrates in the northern districts. The new sterol (sarcosterol) was isolated; its structure as 23 xi, 24 xi-dimethylcholesta-5, 17(20)-trans-dien-3 beta-ol was based on spectra evidence and comparison with cholesta-5, 17(20)-trans-dien-3 beta-ol.
mesh_terms: D000818:Animals; D002775:Cholestadienols / Q000302:isolation & purification*; D002784:Cholesterol / Q000031:analogs & derivatives / Q000302:isolation & purification; D003063:Cnidaria / Q000378:metabolism*; D003684:Dehydrocholesterols / Q000302:isolation & purification*; D010840:Phytosterols; D013261:Sterols / Q000302:isolation & purification*
chemical_list: D002775:Cholestadienols; D003684:Dehydrocholesterols; D010840:Phytosterols; D013261:Sterols; C021689:gorgosterol; C021273:campesterol; C021743:sarcosterol; D002784:Cholesterol