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