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