2Bz4OH5Isoquin-N-IndanBuCONH2 isostere 5-[3(S)-[(1,1-Dimethylethyl)aminocarbonyl]decahydro-2-isoquinolinyl]-4(S)-hydroxy-N-(2(R)-hydroxy-1(S)-indanyl)-2(R)-(phenylmethyl)pentanamide AIDS-006755 AIDS006755