Patent ID: 7452862

Claim:
A compound having the structure of formula II: wherein W, A 1 , A 2 , A 3 and T are defined as below with the NH of A 1 bonded to T, the C═O of A 1 bonded to the NH of A2, the C═O of A2 bonded to the NH of A 3, the C═O of A 3 bonded to W, and (W) and (A 1 ) indicate the site of bonding of T to W and A 1 , respectively: W A 1 NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH W A 2 NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH W A 3 NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH W T NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH NH