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