Patent ID: 7803903

Claim:
A doxorubicin-peptide of the formula I wherein Y=O or S n=1 to 5 m=0 to 6 P 5 -P′ 5 denotes a peptide sequence consisting of up to ten amino acids, said amino acids being selected from the group consisting of the twenty essential amino acids, wherein the peptide sequence can be cleaved by the matrix metalloproteinase 2 and/or 9 (MMP-2 and/or MMP-9) and PM is a protein-binding group which is a maleinimide group, a 2-dithiopyridyl group, a halogen acetamide group, a halogen acetate group, a disulfide group, an acrylic acid ester group, a monoalkylmaleic acid ester group, a monoalkylmaleaminic acid amide group, an isothiocyanate group or an aziridine group, which is optionally substituted and