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