11-(4-Nitro-9-oxo-9,10-dihydro-acridin-1-ylamino)-undecanoic acid 5-acetylamino-6-benzyloxy-4-{1-[1-(1-benzyloxycarbonyl-3-carbamoyl-propylcarbamoyl)-ethylcarbamoyl]-ethoxy}-3-hydroxy-tetrahydro-pyran-2-ylmethyl ester AIDS-137641 AIDS137641 NSC642599