The molecule is an L-alpha amino acid anion obtained by the deprotonation of the three carboxy groups of gamma-carboxy-L-glutamic acid. It is a L-alpha-amino acid anion and a tricarboxylic acid trianion. It is a conjugate base of a gamma-carboxy-L-glutamic acid zwitterion(2-).
(3S)-3-aminopropane-1,1,3-tricarboxylate