Patent ID: 8653235

Claim:
A cyclic peptide compound represented by Formula (I): or a pharmacologically acceptable salt thereof, wherein Xaa 1 and Xaa 5 are each independently optionally substituted seryl, optionally substituted threonyl, or optionally substituted tyrosinyl; Xaa 2 is optionally substituted isoleucyl, optionally substituted valyl, or optionally substituted leucyl; Xaa 3 and Xaa 4 are each independently optionally substituted asparaginyl, optionally substituted glutaminyl, optionally substituted aspartyl, or optionally substituted glutamyl; Cys is cysteinyl; and R 1 is a group represented by either Formula (II): —CO—(CH 2 ) n —NH— (II) wherein n is an integer of 1 to 10, or Formula (III): —NH—(CH 2 ) n —CO— (III) wherein n is an integer of 1 to 10; and in Formula (I), the linkage between Cys and Cys is a peptide bond or a disulfide bond, and the other linkages are peptide bonds.