2,4,5-triphenyl-1,3-oxazin-6-one

2,3-diphenylpyrazolo<1,2-a>benzocinnolin-1-one

2,3,4-triphenyl-1,2-oxazol-5-one

2-(2-chlorophenyl)-3,4-diphenyl-1,2-oxazol-5-one

2-(dimethylamino)-4,5-diphenylpyrrol-3-one