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