Compounds

A cyclic peptide, wherein the cyclic peptide has the following sequence:

• [Formula 1]
• [SEQ ID NO:
• 1]
• C X1 X2 X3 X4 X5
• wherein:
• i) C is selected from the group comprising or consisting of cys, h-cys and d-cys, optionally is cys;
• ii) X1 is selected from the group comprising or consisting of leu, lys and glu, optionally is lys or leu, optionally is lys;
• iii) X2 is:
• wherein:
• R1 is H or methyl;
• R2 is C1-C6 linear or branched alkyl, optionally substituted with —OC1-3 alkyl
• iv) X3 is:
• wherein:
• L1 is C1-C3 alkylene;
• R3 is selected from the group consisting of a C3-C6 cycloalkyl, a 5-6 membered ring and 8-10 membered bicyclic ring, wherein the rings are optionally substituted with phenyl, halogen, —OH, —O(C1-C3 alkyl), C1-C4 alkyl or C1-C4 haloalkyl;
• v) X4 is:
• wherein:
• R4 is H or methyl;
• R5 is C1-C6 linear or branched alkyl, optionally substituted with —OC1-3 alkyl;
• vi) X5 is:
• wherein:
• L2 is C1-C3 alkylene or a direct bond;
• R6 is selected from the group consisting of a C3-C6 cycloalkyl, 5-6 membered ring and 8-10 membered bicyclic ring, wherein the rings are optionally substituted with phenyl, halogen, —NO2, —OH, —O(C1-C3 alkyl), C1-C4 alkyl or C1-C4 haloalkyl;
• wherein: