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