The molecule is a dicarboxylic acid anion obtained by deprotonation of the two carboxy and one of the phosphonate OH groups of (R)-2-(phosphonomethyl)malic acid. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a dicarboxylic acid anion and an organophosphonate oxoanion. It is a conjugate base of a (R)-2-(phosphonomethyl)malic acid.
(2R)-2-hydroxy-2-[[hydroxy(oxido)phosphoryl]methyl]butanedioate