Ethyl 5-amino-4-(difluoromethyl)-2-nitropyridine-3-carboxylate
Methyl 2-amino-3-(difluoromethyl)-5-nitropyridine-6-acetate
Ethyl 3-amino-2-(difluoromethyl)-6-nitropyridine-5-carboxylate
3-Amino-5-(chloromethyl)-2-(difluoromethyl)-6-(trifluoromethyl)pyridine