[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a monocarboxylic acid anion that is the conjugate base of propionylglycine, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a propionylglycine."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O-1]"}]