Methyl 2-bromo-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate
Methyl 6-bromo-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetate
Methyl 6-bromo-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-bromo-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-3-acetate