The molecule is zwitterionic form of L-serine phosphoethanolamine having anionic phosphate and carboxy groups and both amino groups protonated; major species at pH 7.3. It is a tautomer of a L-serine phosphoethanolamine.
(2S)-2-azaniumyl-3-[2-azaniumylethoxy(oxido)phosphoryl]oxypropanoate