[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N+1][#N]"}, {"from": "gpt", "value": "The molecule is the aromatic diazonium ion formed from diazotisation of aniline. It has a role as a hapten."}]