27,30-Bis(4-aminobutyl)-3-(2-amino-2-oxoethyl)-42-(3-amino-3-oxopropyl)-39-benzyl-18-(1-hydroxyethyl)-6,15,33-tris(hydroxymethyl)-36-isobutyl-9,12,24-triisopropyl-1,4,7,10,13,16,19,22,25,28,31,34,37,4\t0-tetradecaoxo-1-(5-oxo-2-pyrrolidinyl)-2,5,8,11,14,17,20,23,26,29,32,35,38,41-tetradecaazatritetracontan-43-oic acid AIDS-135338 AIDS135338 NSC634825