[{"from": "human", "value": "Please give me some details about this molecule. [C][S][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}, {"from": "gpt", "value": "The molecule is a sulfur-containing amino-acid anion that is the conjugate base of methionine, arising from deprotonation of the carboxy group. It is an alpha-amino-acid anion and a sulfur-containing amino-acid anion. It is a conjugate base of a methionine."}]