Patent ID: 7951774

Claim:
A compound of formula (I): wherein R 1 comprises Q-X—Y—R; Q is S or O; X—Y comprises a dipeptide moiety comprising a respective two amino acid residues independently selected from Met, Val, Thr, Tyr, Trp, Ser, and Ala, wherein Y is an L form of the Y amino acid residue and X is a D form of the X amino acid residue, wherein the X amino acid residue forms an ester or thioester bond with Q, and R is H or an amino-protecting group; and, R 2 comprises H, CH 2 OH, or CH 2 -Q-X—Y—R, provided that when R 2 comprises CH 2 -Q-X—Y—R, Q is independently S or O; X—Y comprises a dipeptide moiety comprising a respective two amino acid residues independently selected from Met, Val, Thr, Tyr, Trp, Ser, and Ala, wherein Y is an L form of the Y amino acid residue and X is a D form of the X amino acid residue, wherein the X amino acid residue forms an ester or thioester bond with Q, and R is H or an amino-protecting group; or a pharmaceutically acceptable salt, hydrate, solvate, or prodrug thereof.