29-Amino-2,23-bis(4-aminobutyl)-26-sec-butyl-11-(carboxymethyl)-14,17-bis(1-hydroxyethyl)-8-isobutyl-4,7,10,13,16,19,22,25,28-nonaoxo-3,6,9,12,15,18,21,24,27-nonaazadotriacontane-1,32-dioic acid AIDS-134012 AIDS134012 NSC631177