Glyceric acid amide

D-lactic or D-glyceric acid. The dextrorotation of the three phenyl-hydrazides and of the amide of lactic acid leads to the same conclusion... 

The term lipids in this article is restricted (according to Christie) to esters and amides of the long-chain aliphatic monocarboxylic acids, the fatty acids, and to their bio-synthetically or functionally related compounds. The most abundant lipids are the esters of fatty acids with glycerol (1,2,3-trihydroxypropane), which are denoted as glycer-olipids. Lipids are classified according to the number of hydrolytic products per mol. 

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