2,14-Dibenzyl-10,22-diisopropyl-7,19-dimethyl-4a,5,7,8,10,11,16a,17,19,20,22,23-dodecahydrodipyrido[4,3-h:4',3'-r][1,4,7,11,14,17]hexaazacycloicosine-6,9,12,18,21,24(2H,14H)-hexone AIDS-016395 AIDS016395 NSC610620