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