N,N'-bis(5-isocyanatonaphthyl)urea, a process for its production
N,N'-bis(trans-4-isocyanatocyclohexyl)urea, a process for its pr
N-(2-fluoro-4-halo-5-substituted phenyl)hydantoins, and their pr
Non-phosgene route to the manufacture of organic isocyanates