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