Ethyl 3-amino-2-(difluoromethyl)-6-methoxypyridine-5-carboxylate
4-Amino-2-(difluoromethyl)-3-methoxypyridine-5-carboxylic acid
Ethyl 4-amino-2-(difluoromethyl)-6-methoxypyridine-3-carboxylate
Ethyl 3-amino-2-(difluoromethyl)-5-methoxypyridine-4-carboxylate