[{"from": "human", "value": "Provide a description of this molecule. [C][As][=Branch1][C][=O][Branch1][C][C][O-1].[Na+1]"}, {"from": "gpt", "value": "The molecule is the organic sodium salt of dimethylarsinate. It has a role as a buffer and a herbicide. It contains a dimethylarsinate."}]