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