(2,5-dioxopyrrolidin-1-yl) 3-chlorobenzoate

(2,5-dioxopyrrolidin-1-yl) 2-tritylsulfanylacetate

(2,5-dioxopyrrolidin-1-yl) 1H-indole-3-carboxylate

1-[3-[5-(trifluoromethyl)pyridin-2-yl]oxypropoxy]pyrrolidine-2,5-dione

(2,5-dioxopyrrolidin-1-yl) 2-(methoxymethoxy)benzoate