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