1,6-Hexamethylen-bis(4-hydroximinoformylpyridinium)-dibromid [German] 34312-70-4 37670-00-1 N,N'-Hexamethylenebis(4-hydroxyiminomethylpyridinium bromide) PRO 460 Pyridinium, 1,1'-hexamethylenebis(4-formyl-, dibromide, dioxime