[{"from": "human", "value": "Provide a description of this molecule. [C][As][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is a one-carbon compound that is arsonous acid in which the hydrogen attached to arsenic is replaced by a methyl group. It has a role as a carcinogenic agent, a poison and a human xenobiotic metabolite. It is a member of arsonous acids and a one-carbon compound. It is functionally related to an arsonous acid. It is a conjugate acid of a methylarsonite."}]