[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an alpha-amino-acid anion that is the conjugate base of serine. It has a role as a fundamental metabolite. It is a conjugate base of a serine."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][O]"}]