71519-94-3 Butanoic acid, 3-((5-(acetylamino)-2-methoxyphenyl)amino)-, ethyl ester EINECS 275-590-8 Ethyl 3-((5-(acetylamino)-2-methoxyphenyl)amino)butyrate Ethyl 3-((5-acetamido-2-methoxyphenyl)amino)butanoate