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