Methyl 3-amino-6-(aminomethyl)-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 4-amino-6-(aminomethyl)-3-(difluoromethyl)pyridine-2-carboxylate
4-Bromo-2-(bromomethyl)-6-chloro-3-(difluoromethyl)pyridine
3-Bromo-4-(bromomethyl)-6-chloro-2-(difluoromethyl)pyridine