Ethyl 2-chloro-5-(difluoromethyl)-3-fluoropyridine-4-carboxylate
Methyl 3-(aminomethyl)-2-bromo-4-(difluoromethyl)pyridine-6-carboxylate
Ethyl 2-chloro-4-(difluoromethyl)-6-fluoropyridine-3-carboxylate
Ethyl 2-chloro-4-(difluoromethyl)-5-fluoropyridine-3-carboxylate