[{"from": "human", "value": "What can you tell me about this molecule? [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][S][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the conjugate base of S-carboxymethyl-L-cysteine having anionic carboxy groups and a protonated amino group; major species at pH 7.3. It is an alpha-amino-acid anion and a dicarboxylic acid anion. It is a conjugate base of a S-carboxymethyl-L-cysteine."}]