4(Z),7(Z),10(Z),13(Z),16(Z)-Nonadecapentaenoic acid is an unusual polyunsaturatedfattyacid (PUFA) generated during the synthesis of docosahexaenoic acid-d5 . While the physiological properties of this compound are not known, dietary intake of n-3 long-chain PUFAs provides potential health benefits.
9(Z),12(Z),15(Z),18(Z),21(Z)-Tetracosapentaenoic acid is an ω-3 very long-chainpolyunsaturatedfattyacid. It has been used to study the desaturation and elongation of ω-3 polyunsaturatedfattyacids. It is elongated to form C26:5 or acted on by δ6 desaturase to form C24:6. 9(Z),12(Z),15(Z),18(Z),21(Z)-Tetracosapentaenoic acid is found at low levels in mouse brain and spleen and levels decrease in the brain and spleen of old and exceptionally old mice.
12(Z),15(Z)-Heneicosadienoic acid, an ω-6 very long-chainpolyunsaturatedfattyacid, serves as a positional isomer of heneicosadienoic acid, which is scarcely found in living organisms.