Ethyl 5-amino-4-(difluoromethyl)-3-methoxypyridine-2-carboxylate
5-Amino-4-(difluoromethyl)-3-nitropyridine-2-sulfonamide
Ethyl 3-amino-2-(difluoromethyl)-5-methoxypyridine-6-carboxylate
Ethyl 3-amino-2-(difluoromethyl)-4-methoxypyridine-5-carboxylate