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