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