3-(Difluoromethyl)-2-hydroxy-4-iodopyridine-5-carboxaldehyde
5-(Bromomethyl)-4-cyano-2-(difluoromethyl)-3-hydroxypyridine
Methyl 6-bromo-4-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 4-chloro-2-(difluoromethyl)-3-methoxypyridine-5-carboxylate