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