This invention provides a compound of Formula I or a pharmaceutically acceptable salt thereof (wherein X, Y, Z and n are defined herein). These compounds are useful in the treatment of diseases mediated by topoisomerase I enzyme such as cancers. The present invention also provides processes for the preparation of compounds of Formula I. The compounds of the present invention are more water soluble, stable in buffer solution at various pH, and exhibit better anti-tumor activity and rapid release of SN-38 in tumor microenvironments.
这项发明提供了一种式I化合物或其药用可接受盐(其中X、Y、Z和n在此处定义)。这些化合物在治疗由拓扑异构酶I介导的疾病,如癌症方面具有用处。本发明还提供了制备式I化合物的方法。本发明的化合物在
水溶液中更稳定,在各种pH缓冲溶液中更稳定,并且在肿瘤微环境中表现出更好的抗肿瘤活性和SN-38的快速释放。