Methyl 3-amino-4-(aminomethyl)-2-(difluoromethyl)pyridine-5-acetate
2-Amino-4-(difluoromethyl)-5-methylpyridine-3-acetic acid
Methyl 3-amino-2-(aminomethyl)-5-(difluoromethyl)pyridine-6-acetate
2-Amino-3-(difluoromethyl)-6-methylpyridine-5-acetic acid