AIDS-097474 AIDS097474 [1S-[1R*,2S*(2S*,3R*)]]-[3-[[3-[[3,3-Dimethyl-2-[(methylamino)carbnyl]-1-oxobutyl]amino]-2-hydroxy-4-phenylbutyl]amino]-2-hydroxy-1-(phenylmethyl)propyl]carbamic acid, 1,1-dimethylethyl elster