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