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