The present invention is related to pure compound of structural formula (VIII), process for the purification of compound of structural formula (VIII) and improved process of preparing alcaftadine compound of structural formula (I).
本发明涉及结构式(VIII)的纯化合物,结构式(VIII)化合物的纯化方法和制备结构式(I)的
阿卡夫他定化合物的改进方法。