4-[(2-{(1R)(2-Phenylacetylamino)[N-benzylcarbamoyl]methyl}(4S)-5,5-dimethyl(1,3-thiazolidin-4-yl))carbonylamino](3S,4R)-3-hydroxy-N-(2-methylpropyl)-5-phenylpentanamide AIDS-005484 AIDS005484 Penicillin deriv.