The present invention relates to dual-targeting cytotoxic compounds of formula (I) and to their preparation. The described compounds are endowed with tumour specific action, incorporating three functional units: a tumour recognition moiety and a tumour selective enzymatic substrate sequence connected together by means of a spacer. These conjugates are designed to guarantee serum stability and, at the same time, the desired action inside the tumour cells as a result of enzymatic cleavability. [(L-D)
n
E]
m
-F-D-PI-SI-CT Formula (I).
本发明涉及公式(I)的双靶向细胞毒性化合物及其制备。所述化合物具有肿瘤特异性作用,包含三个功能单元:肿瘤识别基团和肿瘤选择性酶底物序列通过间隔连接在一起。这些共轭物被设计为保证血清稳定性,同时由于酶的可切性,在肿瘤细胞内产生所需的作用。[(L-D)nE]m-F-D-
PI-SI-CT公式(I)。