Ethyl 3-cyano-5-hydroxy-2-(trifluoromethoxy)pyridine-6-acetate
5-Cyano-3-(difluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine
Ethyl 3-cyano-4-hydroxy-6-(trifluoromethoxy)pyridine-2-acetate
Ethyl 3-cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-6-acetate