3-((5-Acetamido-2-methoxyphenyl)amino)propionic acid, ethyl ester 52868-49-2 EINECS 258-226-2 Ethyl N-(5-(acetylamino)-2-methoxyphenyl)-beta-alaninate beta-Alanine, N-(5-(acetylamino)-2-methoxyphenyl)-, ethyl ester