The present invention relates to cytostatics which have a tumour-specific action as a result of linkage to αvβ3 integrin antagonists via preferred linking units. The preferred linking units guarantee serum stability of the conjugate of cytostatic and αvβ3 integrin antagonist and at the same time the desired intracellular action in tumour cells as a result of their enzymatic or hydrolytic cleavability with release of the cytostatic.
本发明涉及通过首选连接单元与αvβ3整合素拮抗剂连接而具有肿瘤特异性作用的细胞毒素。所述首选连接单元保证了细胞毒素与αvβ3整合素拮抗剂的共轭物在血清中的稳定性,同时在肿瘤细胞内具有所需的酶解或
水解性,以释放细胞毒素。