[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is major microspecies at pH 7.3. It is a conjugate base of an ombuin."}, {"from": "gpt", "value": "[C][O][C][=C][Branch2][Ring2][Branch1][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch2][Ring1][#Branch1][C][=Branch1][C][=O][C][=C][Branch1][=C][C][=C][Branch1][Branch2][C][=C][Ring1][=Branch1][O][Ring1][O][O][C][O][O-1][O]"}]