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