Patent ID: 7994134

Claim:
A compound of general formula (I) or pharmaceutically acceptable salt thereof wherein G represents glycine D represents aspartic acid R 1 represents —(CH 2 ) n or —(CH 2 ) n —C 6 H 4 — wherein n represents a positive integer 1 to 10 h represents a positive integer 1 or 2 X 1 represents an amino acid residue wherein said amino acid possesses a functional side-chain such as an acid or amine, X 2 and X 4 represent independently an amino acid residue capable of forming a disulphide bond, X 3 represents arginine, N-methylarginine or an arginine mimetic, X 5 represents a hydrophobic amino acid or derivatives thereof, and X 6 represents a thiol-containing amino acid residue, and X 7 is absent or represents a biomodifier moiety Z 1 represents an antineoplastic agent, a chelating agent or a reporter moiety and W 1 is absent or represents a spacer moiety.