71519-93-2 Butanoic acid, 3-((5-(acetylamino)-4-((2-bromo-4,6-dinitrophenyl)azo)-2-methoxyphenyl)amino)-, ethyl ester EINECS 275-589-2 Ethyl 3-((5-(acetylamino)-4-((2-bromo-4,6-dinitrophenyl)azo)-2-methoxyphenyl)amino)butyrate Ethyl 3-((5-acetamido-4-((2-bromo-4,6-dinitrophenyl)azo)-2-methoxyphenyl)amino)butanoate