Ethyl 6-ethyl-4-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxylate
2-Amino-5-(difluoromethyl)-6-fluoropyridine-3-carboxylic acid
Ethyl 6-cyano-3-(difluoromethyl)-2-fluoropyridine-4-acetate
2-Fluoro-6-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetonitrile