4-(ethoxymethyl)-6-methyl-2-oxo-1H-pyridine-3-carbonitrile

6-ethoxymethyl-2-hydroxy-4-methyl-nicotinonitrile

dimethyl 2-piperidin-1-ylbutanedioate

1,3-dimethyl-6-piperidin-1-ylpteridine-2,4-dione

tert-butyl-dimethoxy-piperidin-1-ylsilane