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