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