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