The molecule is zwitterionic form of (R)-piperazine-2-carboxylic acid having an anionic carboxy group and a protonated 1-amino group. It is a conjugate acid of a (R)-piperazine-2-carboxylate. It is a tautomer of a (R)-piperazine-2-carboxylic acid.
(2R)-piperazin-1-ium-2-carboxylate