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