Ethyl 5-bromo-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-2-carboxylate
Methyl 3-chloro-2-(difluoromethyl)-5-fluoropyridine-6-carboxylate
Ethyl 2-bromo-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-carboxylate
3-Chloro-4-(difluoromethyl)-2-fluoropyridine-5-acetic acid