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