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