Patent ID: 7538084

Claim:
A compound of Formula (I): wherein A is an amino acid of Formula (II): wherein: R 0 is H or CH 3 ; X=hydrogen; hydroxyl; or hydroxyl group derivatized with an alkanoyl, aryloyl, alkylaminocarbonyl, arylaminocarbonyl, arylalkylaminocarbonyl, alkyloxycarbonyl, aryloxycarbonyl, or arylalkyloxycarbonyl group; CO— in Formula II is covalently bound to an α-amino group of B in Formula I to form an amide linkage, and —N—R 0 in Formula II is covalently bound to a carboxylic acid of K to form an amide linkage; B is an amino acid selected from the group consisting of: α-aminobutyric acid; alanine; threonine; valine; norvaline; and a modified α-aminobutyric acid, alanine, valine, or norvaline, wherein a carbon atom in a side chain is substituted with a hydroxyl group; C is a sarcosine; D is an amino acid selected from the group consisting of: leucine; N-methyl leucine; valine; γ-hydroxy-N-methyl leucine; and γ-hydroxy leucine; E is an amino acid selected from the group consisting of: valine; norvaline; and a modified valine or norvaline, wherein a carbon atom in a side chain is substituted with a hydroxyl group; F is an amino acid selected from the group consisting of: leucine; N-methyl leucine; γ-hydroxy-N-methyl leucine; and γ-hydroxy leucine; G is α-aminobutyric acid or alanine; H is D-alanine; I and J are independently selected from the group consisting of: leucine; N-methyl leucine; γ-hydroxy-N-methyl leucine; and γ-hydroxy leucine; K is N-methyl valine or valine; or a pharmaceutically acceptable salt thereof.