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