Methyl 4-bromo-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-6-carboxylate
Methyl 4-bromo-6-(difluoromethyl)-2-(trifluoromethyl)pyridine-3-carboxylate
Methyl 4-bromo-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-carboxylate
Methyl 4-bromo-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-6-carboxylate