Methyl 4-cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-3-acetate
Methyl 3-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-4-acetate
6-Fluoro-2-methyl-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride