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