[{"from": "human", "value": "Describe this molecule. [C][C][=C][Branch1][N][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=C][=O][N][=C][=O]"}, {"from": "gpt", "value": "The molecule appears as colorless to yellow or dark liquid or solid with a sweet, fruity, pungent odor. Melting point 68 \u00b0F (20 \u00b0C). Evolves CO2 when moist. This can cause over-pressurization in an enclosed space.Toxic and carcinogenic. Used in polyurethane foams, coatings in floor and wood finishes, sealers, paints, concrete sealers for aircraft and tank trucks, elastomers in clay pipe seals, elastomers and coatings, and crosslinking agent for nylon.   Rate of onset: Immediate  Persistence: Hours - weeks  Odor threshold: 0.4 - 2 ppm  Source/use/other hazard: Polyurethane (wood coatings, foam), nylon industries; skin irritant."}]