Ethyl 4-chloro-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 5-chloro-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 3-chloro-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-carboxylate
2-(Chloromethyl)-4-cyano-3-(trifluoromethoxy)pyridine-6-acetic acid