[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the alpha-amino-acid anion that is the conjugate base of homomethionine obtained by 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 homomethionine."}, {"from": "gpt", "value": "[C][S][C][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}]