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Sei-ichi Ueno, Chizuo Yonese, ON THE OCCURRENCE OF NEW HIGHLY UNSATURATED FATTY ACIDS, C26H40O2 AND C26H42O2, IN TUNNY OIL, Bulletin of the Chemical Society of Japan, Volume 11, Issue 7, July 1936, Pages 437–442, https://doi.org/10.1246/bcsj.11.437
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Abstract
The mixed liquid acids obtained from the sample oil by cooling were converted into methyl esters which were fractionally distilled under a diminished pressure of 4 mm. From the highest boiling fraction, the authors separated a new highly unsaturated acid C26H40O2((Remark: Graphics omitted.)6) and also detected the occurrence of another new acid C26H42O2 ((Remark: Graphics omitted.)5) besides scoliodonic acid (C24H33O), nisinic acid (C24H36O2) and clupanodonic acid (C22H34O2). The present authors propose the names “thynnic acid” for the acid C26H40O2 and “shibic acid” for the acid C26H42O2.