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