Ethyl 4-amino-2-chloro-5-(difluoromethyl)pyridine-3-carboxylate
Ethyl 3-amino-5-chloro-4-(difluoromethyl)pyridine-2-carboxylate
Ethyl 3-amino-2-chloro-6-(difluoromethyl)pyridine-5-carboxylate
Methyl 6-amino-2-chloro-3-(difluoromethyl)pyridine-4-acetate