1-[2(S)-Hydroxy-4(R)-(4-hydroxy-2,6-dimethyl-benzylcarbamoyl)-5-phenyl-pentyl]-4-[5-(2-methylsulfanyl-pyrimidin-4-yl)-thiophene-2-sulfonyl]-piperazine-2-carboxylic acid tert-butylamide AIDS-166077 AIDS166077