Methyl 3-amino-4-(aminomethyl)-5-(difluoromethyl)pyridine-2-carboxylate
Methyl 2-amino-3-(aminomethyl)-4-(difluoromethyl)pyridine-5-carboxylate
4-Amino-3-(difluoromethyl)-2-methyl-6-nitropyridine
Methyl 6-amino-2-(aminomethyl)-3-(difluoromethyl)pyridine-4-carboxylate