The molecule is conjugate base of erythro-5-phosphonooxy-L-lysine in which the carboxy and phospho groups are anionic and both primary amino groups are cationic; major species at pH 7.3. It is a conjugate base of an erythro-5-phosphonooxy-L-lysine.
(2S,5R)-2,6-bis(azaniumyl)-5-phosphonatooxyhexanoate