Patent ID: 7064218

Claim:
A compound of Formula (I): wherein: Z 1 and Z 2 are independently —N(R 3 )—; R 1 and R 2 are independently substituted alkyl groups of the following structure: wherein R 15 is hydrogen, hydroxyl, alkoxy, alkyl, cycloalkyl, R 16 is hydrogen, hydroxyl, alkoxy, alkyl or cycloalkyl, or R 15 and R 16 together with the atoms to which they are attached form a heterocyclic ring; R 3 is hydrogen, or alkyl; X 2 is aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkenyl, alkynyl, cycloalkyl or heterocyclic; X 1 and X 3 are independently aryl, substituted aryl, heteroaryl, substituted heteroaryl, or —CHR 4 , wherein R 4 is natural or unnatural amino acid side chain; or a pharmaceutically acceptable acid addition salt thereof.