[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is dianion of 2-methylpropanoyl phosphate arising from deprotonation of the phosphate OH groups; major species at pH 7.3. It is a conjugate base of a 2-methylpropanoyl phosphate."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][=Branch1][C][=O][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1]"}]