Methyl 2-amino-6-(bromomethyl)-5-(difluoromethyl)pyridine-3-carboxylate
Methyl 2-amino-6-(bromomethyl)-3-(difluoromethyl)pyridine-5-carboxylate
Methyl 6-amino-3-(bromomethyl)-2-(difluoromethyl)pyridine-4-carboxylate
3-Amino-2-(difluoromethyl)-5-nitro-4-(trifluoromethyl)pyridine