SMILES: C1CNC[C@H]([NH2+]1)C(=O)[O-]
Description: The molecule is zwitterionic form of (S)-piperazine-2-carboxylic acid having an anionic carboxy group and a protonated 1-amino group. It is a conjugate acid of a (S)-piperazine-2-carboxylate. It is a tautomer of a (S)-piperazine-2-carboxylic acid.