6-Benzothiazolecarboxylic acid, 2-[(3S,3aR,6aS)-hexahydro-3-methyl-4-[[(2S)-1-[[[4-(1-methylethyl)phenyl]amino]carbonyl]-2-pyrrolidinyl]carbonyl]-2-oxopyrrolo[3,2-b]pyrrol-1(2H)-yl]-, ethyl ester AIDS-185128 AIDS185128