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