Ethyl 6-(aminomethyl)-2-(difluoromethyl)-4-methoxypyridine-3-carboxylate
Ethyl 2-(aminomethyl)-6-(difluoromethyl)-4-methoxypyridine-3-carboxylate
Ethyl 2-(aminomethyl)-6-(difluoromethyl)-3-methoxypyridine-5-carboxylate
Ethyl 2-(aminomethyl)-6-(difluoromethyl)-3-methoxypyridine-4-carboxylate