Patent ID: 7129226

Claim:
A compound of the formula R—X 1 -Phe-Gly-X 2 —NH 2 wherein X 1 is selected from the group consisting of Asn, Asp, Gly, Ser, and Ala, and X 2 is selected from the group consisting of Leu and Ile, and R is selected from the group consisting of: (a) Cb-(CH 2 ) n —C(O)—X 3 ′— wherein (I) Cb is a carborane, (ii) n is 1, 2, or 3, and (iii) X 3 ′ is selected from the group consisting of a bond, Tyr, Phe, and carboranyl alanine, said carboranyl alanine having the structure: (c) R 3 -carboranyl alanine-, wherein R 3 is selected from the group consisting of H and Arg.