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