4-(Bromomethyl)-6-hydroxy-2-nitro-3-(trifluoromethoxy)pyridine
4-(Bromomethyl)-2-hydroxy-5-nitro-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-5-fluoro-2-methyl-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-3-fluoro-5-methyl-2-(trifluoromethoxy)pyridine