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