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