3-Eth-(E)-ylidene-1-(4-methoxy-benzyl)-pyrrolidine-2,5-dione

(E)-2-ethylidene-3-methylsuccinimide

tert-butyl 3-(2-methoxycarbonylethyl)-4-methylpyrrole-2-carboxylate

3-Eth-(E)-ylidene-1-(4-methoxy-benzyl)-4-methyl-pyrrolidine-2,5-dione

1-(4-Methoxy-benzyl)-3-methyl-pyrrole-2,5-dione