Methyl 2-(bromomethyl)-3-(difluoromethyl)-6-hydroxypyridine-4-carboxylate
5-(Chloromethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-methanol
4-(Bromomethyl)-3-(difluoromethyl)-6-hydroxypyridine-2-carboxylic acid
3-(Chloromethyl)-2-(difluoromethyl)-4-hydroxypyridine-5-methanol