Methyl 6-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 4-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 2-(difluoromethyl)-4-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 3-iodo-4-methyl-2-(trifluoromethoxy)pyridine-5-carboxylate