4-[(2-{(1R)(2-Phenylacetylamino)[N-benzylcarbamoyl]methyl}(4S)-5,5-dimethyl(1,3-thiazolidin-4-yl))carbonylamino](3R,4R)-N-benzimidazol-2-yl-3-hydroxy-5-phenylpentanamide AIDS-005489 AIDS005489 Penicillin deriv.