Ethyl 3-chloro-2-(difluoromethyl)-5-hydroxypyridine-4-acetate
Methyl 5-cyano-3-(difluoromethyl)-2-fluoropyridine-4-carboxylate
6-Chloro-3-(difluoromethyl)-2-hydroxypyridine-4-sulfonyl chloride
3-Cyano-2-(difluoromethyl)-6-fluoropyridine-5-acetic acid