[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a non-essential amino acid. In animals it is synthesized from [phenylalanine]. It is also the precursor of [epinephrine], thyroid hormones, and melanin."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][S][=C][C][=C][Ring1][=Branch1][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O]"}]