1-Ethoxycarbonylmethyl-3-benzylaminomethylenepyrrolidine-2,4-dione 1-Pyrrolidineacetic acid, 2,4-dioxo-3-(((phenylmethyl)amino)methylene)-, ethyl ester 141581-87-5 Ethyl 2,4-dioxo-3-(((phenylmethyl)amino)methylene)-1-pyrrolidineacetate