for the following products
1,6-Hexamethylene bis-(N,N-dimethylsemicarbazide) | N,N'-(Hexane-1,6-diyl)bis(2,2-dimethylhydrazinecarboxamide) | N,N'-1,6-Hexanediyl-bis(2,2-dimethyl)-hydrazine carboxamide | Yellow inhibitor HN-130 and 4,4'-Hexamethylenebis(1,1-dimethylsemicarbazide)
