Methyl 2-(bromomethyl)-4-(difluoromethyl)-3-hydroxypyridine-6-acetate
Methyl 3-(chloromethyl)-5-(difluoromethyl)-2-hydroxypyridine-6-carboxylate
Ethyl 4-(bromomethyl)-6-(difluoromethyl)-3-hydroxypyridine-2-acetate
5-(Chloromethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-acetic acid