AIDS-146277 AIDS146277 Benzyl 2-((2,14-dibenzyl-8-(4-((tert-butoxycarbonyl)amino)butyl)-5-(1-tert-butoxyethyl)-18-(9H-fluoren-9-yl)-11-(1H-indol-3-ylmethyl)-4,7,10,13,16-pentaoxo-17-oxa-3,6,9,12,15-pentaazaoctadec-1-anoyl)a\tmino)cyclopentanecarboxylate NSC672657