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