AIDS-032543 AIDS032543 Ro 31-8959 c-HexCONH analog, trans isomer {(S)-1-[(1S,2R)-1-Benzyl-3-((1S,2R)-2-tert-butylcarbamoyl-cyclohexyl)-2-hydroxy-propylcarbamoyl]-2-carbamoyl-ethyl}-carbamic acid benzyl ester