2,2'-((3,3'-Dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(3-oxo-N-phenylbutyramide) 6505-28-8 Butanamide, 2,2'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(3-oxo-N-phenyl- EINECS 229-388-1