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