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