出版社：Japanese Society of Nutrition and Food Science
摘要：Ethyl ester of linolenic acid was prepared by the bromination method on the acidseparated from linseed oil.By heating this ethyl ester in a CO2 stream at 250°C for 40 hours, polymerized ethyl linolenate was produced. This product shows toxicity to rats. Cyclic ethyl ester was separated from polymerizedethyl linolenate by the urea adduct-forming method, and adistillable esterportion (153-175°C/1.8-2.0 mmHg) was separated from this cyclic ethyl ester by vacuumdistillation. This distillable ester shows extremely acute toxicity, and seems to be themain source of the toxicity of the polymerized ester. Judging from its general property, molecular weight, and infrared absorption spectrum, it is supposed that this distillable ester is a cyclic monomer, and that it conteins a tompound whose molecule has a cyclohexene ring.
