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