A novel hexa-cyclic compound, a derivative of camptothecin, of the general formula: ##STR1## The compound is prepared from an aminoketone compound and a pyranoindolizine compound through Friedlaender reaction. It has an excellent antitumor activity and a high degree of safety, and can be applied as an antitumor medicine for curing tumors of various kinds.
一种新型的六环化合物,是
喜树碱的衍
生物,其一般式为:##STR1## 该化合物是通过弗里德兰德反应从
氨基酮化合物和
吡喃
吲哚啉化合物制备而成的。它具有优异的抗肿瘤活性和高度的安全性,可用作治疗各种类型肿瘤的
抗肿瘤药物。