[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an alpha-amino acid anion that is the conjugate base of homocysteine, obtained by deprotonation of the carboxy group. It has a role as a fundamental metabolite. It is a conjugate base of a homocysteine."}, {"from": "gpt", "value": "[C][Branch1][Ring1][C][S][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}]