[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a divalent inorganic anion obtained by removal of two protons from antimonic acid. It is an antimony oxoanion and a divalent inorganic anion. It is a conjugate base of an antimonate(1-). It is a conjugate acid of an antimonate(3-)."}, {"from": "gpt", "value": "[O][Sb][=Branch1][C][=O][Branch1][C][O-1][O-1]"}]