CONJUGATES COMPRISING AN ANTITUMOUR AGENT AND THEIR USE

摘要

Prodrugs of formula W-Z-M (I) are new:. M = label or therapeutic agent having an active intracellular site (SA); W-Z is a ligand, comprising arm Z and end gp. W; the bond between Z and M inhibits intracellular penetration of (I) and/or inhibits expression of marker-M, and this bond is cleaved selectively by factors secreted by target cells such that M can then be expressed or can enter the cell; W ensures stability of (I) in serum and circulating blood.