[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the arsenic oxoanion that is the conjugate base of dimethylarsinic acid. It is functionally related to an arsinate. It is a conjugate base of a dimethylarsinic acid."}, {"from": "gpt", "value": "[C][As][=Branch1][C][=O][Branch1][C][C][O-1]"}]