2-Cyano-6-(difluoromethyl)-5-methoxypyridine-3-acetic acid
3-Chloro-4-hydroxy-5-(trifluoromethoxy)pyridine-2-acetonitrile
3,4-Dibromo-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
6-(Chloromethyl)-3-(difluoromethyl)-2-hydroxypyridine-4-acetic acid