13342-47-7 AIDS-126865 AIDS126865 NSC129883 tert-Butyl 8-((benzhydrylthio)methyl)-14,23-dibenzyl-3,6,9,12,15,18,21,24-octaoxo-1-phenyl-5,20-bis((tritylthio)methyl)-2-oxa-4,7,10,13,16,19,22,25-octaazaheptacosan-27-oate