3-(Difluoromethyl)-4-iodo-6-methoxypyridine-2-acetonitrile
3-(Chloromethyl)-5-(difluoromethyl)-2-hydroxypyridine-6-acetonitrile
5-(Difluoromethyl)-3-iodo-4-methoxypyridine-2-carboxaldehyde
6-(Chloromethyl)-2-(difluoromethyl)-4-hydroxypyridine-3-carboxaldehyde