2-Chlorobenzyl 4-(20-ethyl-23-(hydroxymethyl)-17-(1-hydroxy-2-methylpropyl)-8,11,26,32-tetraisobutyl-14,29-diisopropyl-5,7,10,13,16,22,25,31-octamethyl-3,6,9,12,15,18,21,24,27,30,33-undecaoxo-1,4,7,10\t,13,16,19,22,25,28,31-undecaazacyclotritriacontan-2-yl)butylcarbamate AIDS-153099 AIDS153099 NSC699053