AIDS-033444 AIDS033444 Aspns-Thz-NH-t-Bu deriv. KNI-391 N-[(1S,2S)-1-Benzyl-3-((R)-4-tert-butylcarbamoyl-thiazolidin-3-yl)-2-hydroxy-3-oxo-propyl]-2,2-dimethyl-succinamic acid