Ethyl 4-(difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxylate
2-Hydroxy-4-nitro-5-(trifluoromethoxy)pyridine-3-sulfonamide
Ethyl 3-(difluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxylate
5-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride