143224-34-4 AIDS-004520 AIDS004520 Compound E N-tert-Butyl-N'-isobutyl-N'-[2(R)-hydroxy-4-phenyl-3(S)-[4-amino-1,4- dioxo-2(S)-(2-quinolinylcarboxamido)butylamino]butyl]urea NSC670881 SC 52151 SC-52151 SC52151 Telinavir