Abstract
In the previous paper, it was assumed that the unsaponifiable matters of rudder fish and silver king fish had the 1, 2-diol structure. This paper showed the existence of the C-O-C bond (ether bond) by means of infrared spectroscopy and hydrogen iodide degradation. Therefore the unsaponifiable matters were presumed to be glyceryl ethers and the molecular weights were measured by the mass spectroscopy of their isopropyridene derivatives. The glyceryl ethers bind two carboxylic acids and exist as diacyl glyceryl ethers in the lipids. It may be that the low eyolution, the inhabitation of deep-sea and the function of the body were considered as the cause of the existence of diacyl glyceryl ethers. It is suspected that diacyl glyceryl ethers in rudder fish may cause diarrhea for somebody.
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