title: Novel fatty acid esters of (7E, 12E, 18R, 20Z)-variabilin from the marine sponge Ircinia felix.
abstract: The methanolic extract of the marine sponge Ircinia felix has yielded nine novel fatty acid esters, (7E, 12E, 18R, 20Z)-variabilin (5Z, 9Z)-22-methyltricosadienoate, (7E, 12E, 18R, 20Z)-variabilin (5Z, 9Z)-tetracosadienoate, (7E, 12E, 18R, 20Z)-variabilin hexadecanoate, (7E, 12E, 18R, 20Z)-variabilin 10-methylhexadecanoate, (7E, 12E, 18R, 20Z)-variabilin 15-methylhexadecanoate, (7E, 12E, 18R, 20Z)-variabilin 14-methylhexadecanoate, (7E, 12E, 18R, 20Z)-variabilin 9-octadecenoate, (7E, 12E, 18R, 20Z)-variabilin octadecanoate, and (7E, 12E, 18R, 20Z)-variabilin 2,11-dimethyloctadecanoate, along with the recently described (7E, 12E, 18R, 20Z)-variabilin 11-methyloctadecanoate. The characterization of the new fatty acids (5Z, 9Z)-22-methyltricosadienoic and 2,11-dimethyloctadecanoic acids is also described. The chemical structures were determined by extensive spectroscopic, chromatographic, and chemical analyses.
authors.affiliation: Departamento de Química, Universidad Nacional de Colombia, Bogotá, Colombia.
authors.forename: A
authors.initials: A
authors.lastname: Martínez
authors.forename: C
authors.initials: C
authors.lastname: Duque
authors.forename: Y
authors.initials: Y
authors.lastname: Fujimoto
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D004952:Esters; D005227:Fatty Acids / Q000032:analysis / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006868:Hydrolysis; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*
chemical_list: D004952:Esters; D005227:Fatty Acids