2,2'-((3,3'-Dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(3-oxo-N-phenylbutyramide) 6358-88-9 Butanamide, 2,2'-((3,3'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(3-oxo-N-phenyl- EINECS 228-789-9