1-[2-(4-methoxy-9H-xanthen-9-yl)ethyl]pyrrolidine-2,5-dione

1-(3,6-dihydro-2H-pyridin-1-ylmethyl)pyrrolidine-2,5-dione

1-(3,4-dihydro-1H-isoquinolin-2-ylmethyl)pyrrolidine-2,5-dione

1-[3-(1,3-dithian-2-ylidene)propyl]pyrrolidine-2,5-dione

1-(2-hydroxy-3-phenoxypropyl)pyrrolidine-2,5-dione