(4S)-4-[[(2S)-(2-Benzyloxycarbonylamino-4-methylsulfanyl-butyrylamino)]-[(2S)-3-phenyl-propionylamino]-6-carbamoyl]-hex-2(E)-enoic acid, ethyl ester AIDS-163914 AIDS163914 CBZ-L-Met-L-Phe-L-Gln-C=C-CO2Et