[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1][S]"}, {"from": "gpt", "value": "The molecule is the L-enantiomer of cysteinium. It has a role as a fundamental metabolite. It is a conjugate acid of a L-cysteine and a L-cysteine zwitterion. It is an enantiomer of a D-cysteinium."}]