Methyl 4-(fluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 3-(difluoromethyl)-2-fluoro-5-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 3-(difluoromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 6-(difluoromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine-3-carboxylate