1-Pyrrolidineacrylic acid, gamma-methyl-, methyl ester 15424-17-6 2-Butenoic acid, 3-(1-pyrrolidinyl)-, methyl ester (9CI) 5-20-01-00356 (Beilstein Handbook Reference) BRN 4671008 Crotonic acid, 3-(1-pyrrolidinyl)-, methyl ester Methyl-3-(N-pyrrolidinyl)crotonate NSC 91035