[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the aromatic diazonium ion that is diazotised 2-aminophenylarsonic acid. It has a role as a hapten. It is functionally related to a phenylarsonate(1-)."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][=Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][N+1][#N][As][=Branch1][C][=O][Branch1][C][O][O-1]"}]