title: New 3-oxo-chol-4-en-24-oic acids from the marine soft coral Eleutherobia sp.
abstract: Two novel cholic acid derivatives and three known steroids were isolated from an octocoral Eleutherobiasp. from Pohnpei Micronesia along with the known briareins minabein-1 (6), minabein-4 (7), minabein-6 (8), minabein-8 (9), and minabein-9 (10). X-ray crystallographic analysis of the known compound minabein-4 allowed assignment of its correct relative and absolute stereochemistry. Consequently, a different structure proposed for the same compound (named independently as nui-inoalide-D) is incorrect.
authors.affiliation: Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616, USA.
authors.forename: Sarah C
authors.initials: SC
authors.lastname: Lievens
authors.forename: Håkon
authors.initials: H
authors.lastname: Hope
authors.forename: Tadeusz F
authors.initials: TF
authors.lastname: Molinski
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D002793:Cholic Acids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry*; D008849:Micronesia; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: C497299:11-acetyl-3-oxo-chol-4-en-24-oic acid; C497300:3-oxo-chol-1,4,22-trien-24-oic acid; D002793:Cholic Acids; D004224:Diterpenes; D013256:Steroids