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