Ethyl 3-amino-2-cyano-6-(difluoromethyl)pyridine-4-carboxylate
3-Amino-6-cyano-2-(difluoromethyl)-5-(trifluoromethyl)pyridine
5-Amino-2-cyano-3-(difluoromethyl)-6-(trifluoromethyl)pyridine
Ethyl 3-amino-2-cyano-4-(difluoromethyl)pyridine-6-carboxylate