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