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