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