Methyl 2-chloro-6-(difluoromethyl)-5-hydroxypyridine-3-carboxylate
4-(Difluoromethyl)-3-methyl-2-nitropyridine-5-sulfonyl chloride
5-Amino-4-(bromomethyl)-2-(difluoromethyl)-3-methoxypyridine
Methyl 2-cyano-3-(difluoromethyl)-6-iodopyridine-5-acetate