[(1E,3E,5E)-2-(azanidylideneamino)-1,4,5,6-tetrakis(azanidylideneazaniumyl)-1-[3-(6-isocyanatohexyl)-5-methyl-2,4,6-trioxo-1,3,5-triazinan-1-yl]-6-(oxomethylideneazaniumyl)hexa-1,3,5-trien-3-yl]azaniumylideneazanide;[2-formyl-2-(6-isocyanatohexylcarbamoyloxymethyl)butyl] N-(6-isocyanatohexyl)carbamate;[2-formyl-3-(6-isocyanatohexylcarbamoyloxy)-2-methylpropyl] N-(6-isocyanatohexyl)carbamate