4-nitro-N-[(1-oxidopyridin-1-ium-4-yl)methyl]benzamide

4-tert-butyl-N-[(1-oxidopyridin-1-ium-4-yl)methyl]benzamide

N-[(1-oxidopyridin-1-ium-4-yl)methyl]-2-phenylacetamide

N-[(1-oxidopyridin-1-ium-4-yl)methyl]-4-phenylbenzamide

3-N-(pyridin-4-ylmethyl)pyridine-3,4-diamine