N-carbamoyl-4-hydroxy-2,5-dioxoimidazolidine-4-carboxamide

10-phenylbenzo[g]pteridine-2,4-dione

5-(2,4-dioxooxolan-3-ylidene)-1,3-diazinane-2,4,6-trione

(1,3,5-trioxo-7-oxa-2,4-diazaspiro[5.5]undec-9-en-8-yl) acetate

10-dodecylbenzo[g]pteridine-2,4-dione