[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a monocarboxylic acid anion resulting from the deprotonation of the carboxy group of (Z)-2-methylureidoacrylic acid. The major species at pH 7.3. It is functionally related to an acrylate. It is a conjugate base of a (Z)-2-methylureidoacrylic acid."}, {"from": "gpt", "value": "[C][/C][=Branch1][Branch2][=C][/N][C][=Branch1][C][=O][N][/C][=Branch1][C][=O][O-1]"}]