摘 要 ：在东北松科鱼鳞云杉（Picea jezoensis Carr.）种子油脂肪酸的分析中，发现有三种不常见脂肪酸未予鉴定，其中一种含量高达25.9％。对此我们进行了分离鉴定，确证为顺一5,9,12一十八碳三烯酸。此酸芬兰 Eero Elomaa[1]已有报导。本实验分析了东北松科其余11种种子油脂肪酸的组成，发现它们都含有顺一5,9,12一十八碳三烯酸，但在我们分析过的东北其他科属180种种子油的脂肪酸中，未发现上述不常见的脂肪酸。这一发现可能对植物分类学的化学依据及其成分之间的分布规律具有一定的参考价值。
Abstract:An unusual fatty acid was iso1ated from seed-oil of Picea jozoensis Carr. by the combined method of urea adducts formation and column chro- matography. On the basis of data obtained from GC. UV. MS. NMR. and IR,this particular fatty acid was elucidated as cis-5, 9, 12-octadecetrienoic acid.Besides, from a number of analytical results, among the fatty acids iso-lated from seed-oils of 12 species of 4 genus, Pinaceae, indigenous to northea-stern region of China, the above said particular unsaturated fatty acid being present in each case.