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