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