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