[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a diisocyanate compound with the two isocyanates linked by a hexane-1,6-diyl group. It has a role as a hapten and an allergen."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][C][C][N][=C][=O][C][C][N][=C][=O]"}]