AIDS-097256 AIDS097256 [1S-[1R*,2S*(2S*,3R*)]]-[2-Hydroxy-3-[[2-hydroxy-3-[[(1-naphthalenyloxy)-acetyl]amino]-4-phenylbutyl]amino]-1-(phenylmethyl)-propyl]carbamic acid, 1,1-dimethylethyl ester