(S)-N-(1S,2R)-[3-[2-[[(1,1-Dimethylethyl)amino]carbonyl]phenyl]-2-hydroxy-1-(phenylmethyl)propyl]-2-[(methylsulfonyl)amino]-3-[(p-methoxyphenyl)sulfonyl]propanamide AIDS-031603 AIDS031603 LY289612 analog