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