1-hydroxy-2,2,6,6-tetramethylpiperidine

2-(3,4-dimethoxyphenyl)-1,2-diphenylethanone

2,2-bis(3,4-dimethoxyphenyl)-1-phenylethanone

.β.-Dimethylamino-.α.-phenylpropiophenone hydrochloride

2-(4-nitrophenyl)-1,2-diphenylethanone