AIDS-110884 AIDS110884 D-Valine, N-[(4S)-2,2-difluoro-4-[[(2S)-3-methyl-1-oxo-2-[[(phenylmethoxy)carbonyl]amino]butyl]amino]-1,3-dioxo-5-[4-(phenylmethoxy)phenyl]pentyl]-, 1,1-dimethylethyl ester