Ethyl 3-chloro-4-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 3-chloro-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2-chloro-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-chloro-5-(difluoromethyl)-4-(trifluoromethoxy)pyridine-3-carboxylate