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