AIDS-126864 AIDS126864 NSC129858 tert-Butyl 4-amino-10,19-dibenzyl-16-(((isobutoxymethyl)thio)methyl)-5,8,11,14,17,20-hexaoxo-1,1,1-triphenyl-2-thia-6,9,12,15,18,21-hexaazatricosan-23-oate