3-(Chloromethyl)-4-(difluoromethyl)-5-hydroxypyridine-2-methanol
5-(Aminomethyl)-2-(difluoromethyl)-3-hydroxypyridine-4-methanol
4-(Aminomethyl)-3-(difluoromethyl)-2-hydroxypyridine-5-methanol
4-(Aminomethyl)-6-(difluoromethyl)-3-hydroxypyridine-2-methanol