2-(Aminomethyl)-6-bromo-4-(difluoromethyl)pyridine-3-acetic acid
2-(Aminomethyl)-3-bromo-6-(difluoromethyl)pyridine-5-acetic acid
5-(Bromomethyl)-4-chloro-3-(difluoromethyl)-2-fluoropyridine
5-Chloro-4-(chloromethyl)-3-(difluoromethyl)-2-fluoropyridine