Synonyms: 3,5,9-Trioxa-4-phosphaeicosan-1-aminium,4-hydroxy-N,N,N-trimethyl-10-oxo-7-[(1-oxoundecyl)oxy]-, inner salt, 4-oxide,(R)-; Choline, hydroxide, dihydrogen phosphate, inner salt, ester with1,2-diundecanoin, L- (8CI); Undecanoin, 1,2-di-, dihydrogen phosphate,monoester with choline hydroxide inner salt, L- (8CI)