(4S)-4-[[(2S)-(2-Benzyloxycarbonylamino-2-cyclohexyl-acetylamino)]-[(2S)-3-phenyl-propionylamino]-6-carbamoyl]-hex-2(E)-enoic acid, ethyl ester AIDS-163917 AIDS163917 CBZ-L-CyclohexGly-L-Phe-L-Gln-C=C-CO2Et