AIDS-184504 AIDS184504 Butyl (2S)-2-[(4-{N-[(3-{[(5-{N-[(1S)-1-(butoxycarbonyl)ethyl]carbamoyl}imidazol-4-yl)carbonylamino]methyl}phenyl)methyl]carbamoyl}imidazol-5-yl)carbonylamino]propanoate