[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a acid that is propane in which three carboxy groups are attached at the C-1 position. It is a conjugate acid of a 1,1,1-propanetricarboxylate."}, {"from": "gpt", "value": "[C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][Branch1][=Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]