6-(Chloromethyl)-3-(difluoromethyl)-4-hydroxypyridine-2-acetic acid
3-(Chloromethyl)-6-(difluoromethyl)-4-iodo-2-methoxypyridine
3-(Aminomethyl)-6-(difluoromethyl)-2-hydroxypyridine-5-acetic acid
4-(Difluoromethyl)-6-iodo-3-methoxypyridine-2-acetonitrile