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