Methyl 2-amino-6-bromo-3-(difluoromethyl)pyridine-5-carboxylate
Methyl 5-amino-2-bromo-4-(difluoromethyl)pyridine-3-carboxylate
Methyl 6-amino-3-bromo-2-(difluoromethyl)pyridine-4-carboxylate
3-Amino-5-(aminomethyl)-6-(difluoromethyl)-2-fluoropyridine