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