68334-46-3 68400-27-1 Poly(oxy(methyl-1,2-ethanediyl)), alpha,alpha'-(1,2-ethanediyl)bis(4'-isocyanatophenylene-1'-methylene-1-phenylene-4-iminocarbonyl)- Poly(oxy(methyl-1,2-ethanediyl)), alpha,alpha'-1,2-ethanediylbis(omega-((((4-((4-isocyanatophenyl)methyl)phenyl)amino)carbonyl)oxy)- Poly(oxy(methyl-1,2-ethanediyl)-alpha,alpha'-1',2-ethanediyl, bis(4'-isocyanatophenylene-1'-methylene-1-phenylene-4-iminocarbonyl)-