Ethyl 6-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 2-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-carboxylate
3-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-5-acetonitrile
2-Fluoro-4-(difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine