Ethyl 2-fluoro-5-hydroxy-4-(trifluoromethoxy)pyridine-3-acetate
Methyl 6-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Ethyl 2-fluoro-4-hydroxy-5-(trifluoromethoxy)pyridine-3-acetate
3-Cyano-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid