N ,N-diethyl-4-(2,4-dinitro-6-alkylsulfonylphenylazo)-2-alkoxy-5

N'-Derivatives of N-(2-mercapto-ethyl)-2-nitro-1,1-ethenediamine

N'-substituted derivatives of 4'-(N-piperazinylmethyl) spiro dib

N'Cyclopropyl-N-(fluorophenyl)-N-hydroxyureas

N(2-Pyrrolidinylmethyl)meta-sulfonamido-benzamides

N(O,O dialkylphosphonyl alkylene) esters of oxazolidone, benzoxa

N,2-Dicyanoacetimidates

N,N"(pyridinediyl)dioxamate compounds

N,N'(Cyano-phenylene)dioxamic acids and esters

N,N'-(polybromophenoxycarbonyl)piperazines

N,N'-bis(1,1-dioxohydrothienyl)diaminoalkanes

N,N'-bis(3,4-dicyanophenyl) alkanediamides

N,N'-bis(4-azidobenzoyl)cystine

N,N'-bis-[(.beta.-hydroxy-.beta.-phenyl)-ethyl]-polymethylenedia

N,N'-bisimidothio-diamines

N,N'-bisphenoxybenzyl-bridged-diamides

N,N'-bis[3-substituted-4-hydroxypheyl)-2-hydroxyethyl)] -polymet

N,N'-bis{6-[(3,4-dihydroxyphenyl)alkylamino]-hexyl}hexamethylene

N,N'-Bridged-bis(2-alkyl-2-hydroxyethylamine) dioxides

N,N'-bridged-bis[2-alkyl-2-hydroxyethylamines]