3-(Difluoromethyl)-6-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-2-hydroxy-4-nitro-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-5-hydroxy-2-nitro-3-(trifluoromethoxy)pyridine
Methyl 3-(bromomethyl)-2-fluoro-6-(trifluoromethoxy)pyridine-4-carboxylate