Methyl 3-cyano-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 2-cyano-6-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-carboxylate
Methyl 3-cyano-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 6-cyano-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-carboxylate