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 by the condensation-ring closing reaction. It is abundantly water-soluble, and 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,是一种
喜树碱衍
生物,其通式为:##STR1## 该化合物是由
氨基酮化合物和
吡喃
吲哚啉化合物通过缩合-环闭合反应制备而成。它具有丰富的
水溶性,优异的抗肿瘤活性和高度的安全性,可作为治疗各种肿瘤的
抗肿瘤药物。