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