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