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１引 言 在我国东北地区生长着大面积的松林。关于松籽油中脂肪酸化学成份的报道极少。我们在研究中发现了一种新的亚麻酸位置异构体，它的化学结构采用多种科学手段分析确定，确证了松籽油中含有的亚麻酸既不同于γ－亚麻酸也不同于 α－亚麻酸，是新的十八碳三烯酸结构，称为
1 Introduction In northeast China, a large area of pine forest is growing. There is very little report on the chemical composition of fatty acids in pine nut oil. In our study, we found a new linolenic acid positional isomer whose chemical structure was determined by various scientific means and confirmed that linolenic acid contained in pine nut oil is different from both γ-linolenic acid and α - Linolenic acid, a new octadecatrienoic acid structure, is called