[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][#Branch2][C][P][=Branch1][C][=O][Branch1][C][O][O-1][O]"}, {"from": "gpt", "value": "The molecule is an organophosphonate oxoanion that is the conjugate base of 2-hydroxyethylphosphonic acid, arising from deprotonation of one of the two phosphonate OH groups; major species at pH 7.3. It is a conjugate base of a 2-hydroxyethylphosphonic acid."}]