2,2'-(Ethylenebis(oxyphenyl-2,1-eneazo))bis(N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxobutyramide) 77804-81-0 85497-06-9 Butanamide, 2,2'-(1,2-ethanediylbis(oxy-2,1-phenyleneazo))bis(N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxo- EINECS 278-770-4