glycerophosphoric acid

noun

glyc·​ero·​phos·​phor·​ic acid -ˌfäs-ˈfȯr-ik-  -ˈfär-; -ˈfäs-f(ə-)rik- 

: either of two isomeric dibasic acids C₃H₉O₆P occurring naturally in combined form as lecithin and phosphatidylethanolamine and used in medicine in the form of salts