Patent ID: 8642801

Claim:
A compound of Formula V: wherein: A is nitrogen or oxygen; R 11 is hydrogen, salt-forming cation, ester forming group, or when A is nitrogen, A and R 11 taken together form the residue of a natural or unnatural amino acid or a salt or ester thereof, wherein A and R 11 taken together are not a leucine residue; n is 3 or 4; aa is an amino acid residue selected from a natural amino acid residue selected from the group consisting of phenylalanine, tyrosine, or an unnatural amino acid residue selected from the group consisting of para-aminophenylalanine, para-bromophenylalanine, ortho-chlorophenylalanine, meta-chlorophenylalanine, para-chlorophenylalanine, meta-chlorotyrosine, 3,4-dichlorophenylalanine, 3,4-difluorophenylalanine, 3,5-diiodotyrosine, ortho-fluorophenylalanine, meta-fluorophenylalanine, para-fluorophenylalanine, meta-fluorotyrosine, homophenylalanine, homotyrosine, para-iodophenylalanine, 3-iodotyrosine, meta-methyltyrosine, para-nitrophenylalanine, 3-nitrotyrosine, ortho-phosphotyrosine, pentafluorophenylalanine, and phenylglycine wherein said amino acid residue is in the L configuration; m is 1, 2, or 3; R 14 is hydrogen or protecting group; R 15 is hydrogen, alkyl or aryl; and pharmaceutically acceptable salts, esters, or prodrugs thereof.