The molecule is trianion of (R)-3-hydroxy-2-oxo-4-phosphonooxybutanoic acid arising from deprotonation of both the carboxyl and phosphate functions. It is an organophosphate oxoanion and a 2-oxo monocarboxylic acid anion. It is a conjugate base of a (R)-3-hydroxy-2-oxo-4-phosphonooxybutanoic acid.
(3R)-3-hydroxy-2-oxo-4-phosphonatooxybutanoate