AIDS-005490 AIDS005490 N-((1R)-2-Hydroxy-1-phenylethyl)-4-[(2-{(1R)(2-phenylacetylamino)[N-benzylcarbamoyl]methyl}(4S)-5,5-dimethyl(1,3-thiazolidin-4-yl))carbonylamino](3R,4R)-3-hydroxy-5-phenylpentanamide Penicillin deriv.