[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][=C][C][=Branch1][C][=O][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O][P][=Branch1][C][=O][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is an optically active form of 2-amino-3-oxo-4-(phosphonooxy)butanoic acid having (2S)-configuration. It is a conjugate acid of a (2S)-2-amino-3-oxo-4-(phosphonatooxy)butanoate(3-)."}]