[{"from": "human", "value": "Describe this molecule. [O][As][=Branch1][C][=O][Branch1][C][O-1][O-1].[Na+1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an inorganic sodium salt composed from sodium cations and arsenate dianions in a 2:1 ratio. It has a role as a poison. It contains an arsenate(2-)."}]