Ethyl 5-(bromomethyl)-2-cyano-3-(difluoromethyl)pyridine-6-acetate
Methyl 3-(aminomethyl)-2-(difluoromethyl)-6-hydroxypyridine-4-acetate
Methyl 3-fluoro-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylate
4-Amino-3-hydroxy-5-(trifluoromethoxy)pyridine-2-acetic acid