Optically Active Acetotriglycerides from the Lipids of a Scale Insect, Icerya purchasi MASKELL (Hemiptera: Margarodidae)

Abstract

Optically active acetotriglycerides were isolated from the lipids of a scale insect, Icerya purchasi. The hydrogenated Icerya acetotriglycerides gave a plain, negative opticalrotatory dispersion curve. Comparison of the triglycerides with those of known configuration in the optical-rotatory behavior showed that the Icerya acetotriglycerides were essentially (S)-1, 2-diacyl-3-acetin. The constituent acetotriglyceride acids, other than acetic, were ordinary long-chain fatty acids. Stearic, oleic and linoleic acids were present in abundance in the 2-position.