Ritonavir O-Acyl Isomer

(2S,3S,5S)-5-amino-1,6-diphenyl-2-([[thiazol-5-ylmethoxy)carbonyl]amino]hexan-3-yl 2-(3-((2-isopropylthiazol-4-yl)methyl)-3-methylureido)-3-methylbutanoate Hydrochloride, is a prodrug of Ritonavir (R535000), which is a selective HIV protease inhibitor.