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