[{"from": "human", "value": "What can you tell me about this molecule? [C][C][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a S-alkyl-L-cysteine that is L-cysteine in which the hydrogen of the thiol group is substituted by an ethyl group. It has a role as an antitubercular agent. It is a tautomer of a S-ethyl-L-cysteine zwitterion."}]