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