Patent ID: 7423021

Claim:
A compound or pharmaceutically acceptable salt thereof of the formula Y 1 —X 1 —X 2 —X 3 —X 4 —X 5 —X 6 —Y 2 wherein Y 1 is a hydrogen, a methyl, an acetyl, or is characterized by a chain of 1 to 32 carbon atoms; X 1 is an L- or D-amino acid selected from the group consisting of tranexamic acid and trans-4-(guanidinomethyl) cyclohexanecarboxylic acid; X 2 is absent, or is an L- or D-amino acid selected from the group consisting of Ala, Val, Leu, Ile, Nle, Ser, Thr, Tyr, Pro, Cit, Arg, Lys, Orn, His, Glu, Asp, Trp, Cha (cyclohexylalanine), and Chg (cyclohexylglycine); X 3 is an L- or D-amino acid selected from the group consisting of Cha and Chg; X 4 is an L- or D-amino acid selected from the group consisting of Pro and Aze (azetidine-2-carboxylic acid); X 5 is an L- or D-amino acid selected from the group consisting of Tyr and Phe; X 6 is an L- or D-amino acid selected from the group consisting of Arg, Lys, Orn, and Har; and Y 2 is a hydrogen, a hydroxyl, an amino, 7-amido-4-methylcoumarin, or paranitroanilide.