6-chloro-2,3-diphenylquinoxaline

2-oxo-5,6-diphenyl-1H-pyrazine-3-carboxamide

3-benzyl-5,5-diphenylimidazolidine-2,4-dione

N-[(E)-[(2E)-2-(benzoylhydrazinylidene)-1,2-diphenylethylidene]amino]benzamide

[(2-oxo-1,2-diphenylethylidene)amino]urea