1-(4-butoxyphenyl)pyrrole-2,5-dione

1-(4-butoxyphenyl)-3-pyrrolidin-1-ylpyrrolidine-2,5-dione

1-(4-butoxyphenyl)-3-piperidin-1-ylpyrrolidine-2,5-dione

N-(p-n-Butoxyphenyl)-α-(p-methoxyanilino)-succinimide

1-(4-Butoxy-phenyl)-3-(4-ethoxy-phenylamino)-pyrrolidine-2,5-dione