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