Ethyl 4-fluoro-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 3-fluoro-4-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylate
3-Fluoro-6-iodo-2-nitro-5-(trifluoromethoxy)pyridine
Ethyl 3-fluoro-2-hydroxy-5-(trifluoromethoxy)pyridine-6-carboxylate