3-(Chloromethyl)-2-(difluoromethyl)-4-methylpyridine-6-acetic acid
3-(Chloromethyl)-2-(difluoromethyl)-4-methylpyridine-5-acetic acid
6-(Chloromethyl)-2-(difluoromethyl)-3-methylpyridine-4-acetic acid
2-(Chloromethyl)-6-(difluoromethyl)-5-methylpyridine-3-acetic acid