Patent ID: 8846601

Claim:
A cyclic peptide having the structure of formula (III): or a pharmaceutically acceptable salt thereof, wherein R 10 is —(CH 2 ) x —C(═O)—NH—(CH 2 ) y —, —(CH 2 ) x —NH—C(═O)—(CH 2 ) y —, —(CH 2 ) x —C(═O)—(CH 2 ) z —C(═O)—(CH 2 ) y —, —(CH 2 ) x —C(═O)—NH—C(═O)—(CH 2 ) y —, or —(CH 2 ) x —NH—C(═O)—NH—(CH 2 ) y —: x is 1 to 5; y is 1 to 5; and z is in each instance independently 1 to 5.