Methyl 2-(bromomethyl)-6-(difluoromethyl)-3-hydroxypyridine-5-acetate
Ethyl 2-(chloromethyl)-4-(difluoromethyl)-5-hydroxypyridine-3-acetate
6-(Chloromethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-acetonitrile
Ethyl 4-(aminomethyl)-3-(difluoromethyl)-2-hydroxypyridine-5-acetate