[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid anion that is the conjugate base of methoxyacetic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a methoxyacetic acid."}]