the analogue lacking a fatty acid at c-1 , alpha-glycerophosphocholine , was inactive as were choline , lysophosphatidic acid , lysophosphatidylserine , lysophosphatidylglycerol , lysophosphatidylethanolamine , lecithin , phosphatidic acid , phosphatidylserine , and phosphatidylethanolamine .
C0017889
glycerophosphocholine
C0031617
lecithin