3-(N-n-Butyl-N-acetyl)aminopropionic acid ethyl ester 362607-57-6 52304-36-6 AI 3-70763 BAAPE EBAAP EINECS 257-835-0 Ethyl N-acetyl-N-butyl-beta-alaninate Ethyl butylacetylaminopropionate IR 3535 Merck 3535 N-Acetyl-N-butyl-beta-alanine, ethyl ester Repellent 3535 beta-alanine, N-acetyl-N-butyl-, ethyl ester insect repellent Merck 3535