Ethyl 2-bromo-5-(difluoromethyl)-4-fluoropyridine-3-carboxylate
Ethyl 2-bromo-5-(difluoromethyl)-3-fluoropyridine-4-carboxylate
Ethyl 2-bromo-4-(difluoromethyl)-6-fluoropyridine-3-carboxylate
Ethyl 2-bromo-4-(difluoromethyl)-3-fluoropyridine-5-carboxylate