[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a divalent inorganic anion obtained by removal of both protons from tungstic acid. It is a divalent inorganic anion and a tungsten oxoanion. It is a conjugate base of a hydrogentungstate."}, {"from": "gpt", "value": "[O-1][W][=Branch1][C][=O][=Branch1][C][=O][O-1]"}]