title: Novel methoxylated FA from the Caribbean sponge Spheciospongia cuspidifera.
abstract: The delta6 monoenoic methoxylated FA (6Z)-2-methoxy-6-heptadecenoic acid and (6Z)-2-methoxy-6-octadecenoic acid were identified for the first time in nature in the phospholipids from the uncommon Caribbean sponge Spheciospongia cuspidifera. These findings expand the occurrence of A6 2-methoxylated FA to C17-C18 chain lengths and establish a new FA biosynthetic possibility for these marine organisms. The novel methoxylated FA also could have originated from the phospholipids of a bacterium in symbiosis with the sponge.
authors.affiliation: Department of Chemistry, University of Puerto Rico, San Juan. ncarball@upracd.upr.clu.edu
authors.forename: Néstor M
authors.initials: NM
authors.lastname: Carballeira
authors.forename: Johanna
authors.initials: J
authors.lastname: Alicea
mesh_terms: D000818:Animals; D005227:Fatty Acids / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D011161:Porifera / Q000737:chemistry*; D013229:Stearic Acids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C466220:(6)-2-methoxy-6-heptadecenoic acid; C466219:6-2-methoxy-6-octadecenoic acid; D005227:Fatty Acids; D013229:Stearic Acids