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