AIDS-184489 AIDS184489 Butyl (2S)-2-{[4-(N-{2-[(5-{N-[(1S)-1-(butoxycarbonyl)-2-methylpropyl]carbamoyl}imidazol-4-yl)carbonylamino]ethyl}carbamoyl)imidazol-5-yl]carbonylamino}-3-methylbutanoate