Synonyms: Butanamide, 2,2'-((3,3'-dichloro(1,1'-biphenyl)-4,4'-diyl)bis(2,1-diazenediyl))bis(3-oxo-, N,N'-bis(phenyl and 2,4-xylyl) derivs.;Butanamide, 2,2'-((3,3'-dichloro(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(3-oxo-, N,N'-bis(phenyl and 2,4-xylyl) derivs.