2,3,7,8-tetraphenylpyrazino[2,3-g]quinoxaline

3-methylsulfonyl-5,6-diphenyl-1,2,4-triazine

4-benzoyl-1-(4-methoxyphenyl)-3-methyl-4-phenylazetidin-2-one

4-benzoyl-1-(4-methoxyphenyl)-3,4-diphenylazetidin-2-one

4-benzoyl-1-(4-chlorophenyl)-3,4-diphenylazetidin-2-one