(2R)-1-[(1-{(2R)-3-[(Acetylamino)methylthio]-2-[(tert-butoxy)carbonylamino]-3-methylbutanoyl}(2S,4R)-4-(4-quinolyloxy)pyrrolidin-2-yl)carbonylamino]-2-vinylcyclopropanecarboxylic acid AIDS-162126 AIDS162126