5-[2(S)-[(1,1-Dimethylethyl)aminocarbonyl]-4-[[(1,1-dimethylyethoxy)carbonyl]-methyl]-1-piperazinyl]-4(S)-hydroxy-N-(2(R)-hydroxy-1(S)-indanyl)-2(R)-(phenylmethyl)pentanamide AIDS-033562 AIDS033562 L-735,524 analog