title: New 2-hydroxy fatty acids in the Caribbean urchin Tripneustes esculentus.
abstract: The novel alpha-hydroxy fatty acids 2-hydroxy-13-docosenoic acid [1a], 2-hydroxy-14-tricosenoic acid [2a], and 2-hydroxy-15-tetracosenoic acid [3a] were identified in the Caribbean urchin, Tripneustes esculentus. The double-bond positions of the novel alpha-hydroxy fatty acids were determined by derivatization with dimethyl disulfide and shown to correlate with the corresponding non-hydroxylated mono-unsaturated fatty acids, 13-docosenoic acid, 14-tricosenoic acid, and 15-tetracosenoic acid also present in T. esculentus. The total fatty acid composition of the urchins is also reported where cis-5-olefinic fatty acids such as 5,9-octadecadienoic acid and 5,11-eicosadienoic acid were found to predominate in the mixture. Cholesterol was the predominant sterol in T. esculentus.
authors.affiliation: Department of Chemistry, University of Puerto Rico, San Juan 00931-3346.
authors.forename: N M
authors.initials: NM
authors.lastname: Carballeira
authors.forename: F
authors.initials: F
authors.lastname: Shalabi
authors.forename: M
authors.initials: M
authors.lastname: Reyes
mesh_terms: D000447:Aldehydes / Q000737:chemistry / Q000302:isolation & purification; D000818:Animals; D002784:Cholesterol / Q000737:chemistry / Q000302:isolation & purification; D002855:Chromatography, Thin Layer; D005227:Fatty Acids / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D010743:Phospholipids / Q000737:chemistry / Q000302:isolation & purification; D012617:Sea Urchins / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D005227:Fatty Acids; D010743:Phospholipids; D002784:Cholesterol