[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an organosulfonate oxoanion that is the conjugate base of 3-oxopropane-1-sulfonic acid, obtained by deprotonation of the sulfo group; major species at pH 7.3. It is a conjugate base of a 3-oxopropane-1-sulfonic acid."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][S][=Branch1][C][=O][=Branch1][C][=O][O-1][C][=O]"}]