[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=Branch2][Ring1][Ring2][=C][C][=C][Ring1][=Branch1][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=C][=O][N][=C][=O]"}, {"from": "gpt", "value": "The molecule is a diisocyanate consisting of diphenylmethane with two isocyanate groups at the 4- and 4'-positions. It has a role as a hapten and an allergen. It derives from a hydride of a diphenylmethane."}]