Ethyl 5-(difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate
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