3-(4-Hydroxybenzyl)-6-isopropyl-9,12-dimethyl-1,4,7,10,13,16-hexaazacyclooctadecane-2,5,8,11,14,17-hexone AIDS-132593 AIDS132593 Cyclo-Tyr-Gly-Gly-Ala-Ala-Val NSC626920