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