[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the conjugate base of 3-(2,3-dihydroxyphenyl)propanoic acid. It is functionally related to a propionate. It is a conjugate base of a 3-(2,3-dihydroxyphenyl)propanoic acid."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][N][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][O][C][C][C][=Branch1][C][=O][O-1]"}]