4-(Bromomethyl)-6-(difluoromethyl)-3-methoxypyridine-2-acetic acid
4-(Bromomethyl)-2-(difluoromethyl)-3-methoxypyridine-6-acetic acid
3-(Bromomethyl)-5-(difluoromethyl)-2-methoxypyridine-6-acetic acid
5-(Bromomethyl)-4-(difluoromethyl)-2-methoxypyridine-3-acetic acid