Novel heneicosadienoic and tricosadienoic acid isomers in ovaries of marine archaeogastropods.
To investigate unusual odd-chain fatty acids (FA) from gonads of archaeogastropods, limpets Cellana grata and Cellana toreuma, a subfraction enriched in FA with two double bonds extracted from the gonads was obtained by using argentation thin-layer chromatography. The resulting fraction was analyzed by using capillary gas chromatography-mass spectrometry of its methyl esters, 3-pyridylcarbinol esters and pyrrolidide derivatives. Six novel all-cis diene isomers were identified as 7,18-heneicosadienoic (21:2Δ7,18), 8,14-tricosadienoic (23:2Δ8,14), 9,15-tricosadienoic (23:2Δ9,15), 7,18-tricosadienoic (23:2Δ7,18), 9,18-tricosadienoic (23:2Δ9,18), and 9,20-tricosadienoic (23:2Δ9,20) acids. In the present study, the differences in the proportion of tricosadienoic acid isomers between the ovary lipids of C. grata and C. toreuma were recognized.
Bioscience Laboratory, Miyako College, Iwate Prefectural University, Miyako, Japan. ajoe@iwate-pu.ac.jp
Hideki
H
Kawashima
Masao
M
Ohnishi
D000818:Animals; D005231:Fatty Acids, Unsaturated / Q000032:analysis* / Q000737:chemistry; D005260:Female; D049851:Gastropoda / Q000737:chemistry*; D010053:Ovary / Q000737:chemistry*
D005231:Fatty Acids, Unsaturated