4-((3-Methoxy-4-((((2-methoxy-5-methyl-4-((4-sulfophenyl)azo)phenyl)amino)carbonyl)amino)phenyl)azo)benzenesulfonic acid, salt with 2,2',2''-nitrilotriethanol 72102-86-4 Benzenesulfonic acid, 4-((3-methoxy-4-((((2-methoxy-5-methyl-4-((4-sulfophenyl)azo)phenyl)amino)carbonyl)amino)phenyl)azo)-, compd. with 2,2',2''-nitrilotris(ethanol) (1:2)