1-(3,4-dimethoxyphenethyl)-3-ethyl-5-(phenylsulfinyl)piperidine-2,6-dione

1-(3,4-dimethoxy-phenethyl)-5-(2-methyl-[1,3]dithiolan-2-yl)-1H-pyridin-2-one

5-acetyl-1-[2-(3,4-dimethoxyphenyl)ethyl]piperidin-2-one