Methyl 3-amino-6-chloro-2-(difluoromethyl)pyridine-4-carboxylate
Methyl 5-amino-4-chloro-2-(difluoromethyl)pyridine-3-carboxylate
Methyl 6-amino-2-chloro-3-(difluoromethyl)pyridine-4-carboxylate
2-Amino-5-chloro-6-(difluoromethyl)pyridine-3-acetic acid