Patent ID: 7521416

Claim:
A compound comprising the formula: X—R 1 -D-[Dpr, Orn or Lys](A)-R 2 (Z)-D-[Dpr, Orn or Lys](B)—R 3 (Y)—NR 4 R 5 ; or R 1 (X)-D-[Dpr, Orn or Lys](A)-R 2 (Z)-D-[Dpr, Orn or Lys](B)—R 3 (Y)—NR 4 R 5 , wherein: X is a hard acid cation chelator, a soft acid cation chelator, or Ac—; R 1 is a covalent bond or a D-amino acid selected from the group consisting of D-Tyr, D-Ala, D-Ser, D-Thr, D-Cys, D-Leu, D-Ile, D-Met, D-Gln, D-Val, D-Pro, D-His, D-Trp, D-Glu, D-Asp, and D-Lys; R 2 is a covalent bond or a D-amino acid selected from the group consisting of D-Asp, D-Glu and D-Tyr; R 3 is a covalent bond or D-Lys; Y is a hard acid cation chelator, a soft acid cation chelator or is absent; Z is a hard acid cation chelator, a soft acid cation chelator or is absent; A and B independently are haptens or hard acid cation chelators and can be the same or different; and R 4 or R 5 is a therapeutic agent, diagnostic agent or enzyme.