O-phosphoethanolamine2-amino-ethanol dihydrogen phosphate2-amino-ethanol phosphateEAPEthanolamine phosphateO-PhosphoethanolamineO-PhosphorylethanolamineO-phosphocolamineOPEPEPEAPETNPhosphoethanolaminecolamine phosphatecolamine phosphoric acidcolaminphosphoric acidethanolamine O-phosphateethanolamine acid phosphatemono(2-aminoethyl) phosphatemonoaminoethyl phosphatepEtNphosphoric acid 2-aminoethyl phenyl esterphosphoryl-ethanolamine