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