(2R)-2-((4S)-4-{N-[(2S,1R)-3-Carbamoyl-2-hydroxy-1-benzylpropyl]carbamoyl}-5,5-dimethyl(1,3-thiazolidin-2-yl))-2-(2-phenylacetylamino)-N-benzylacetamide AIDS-005482 AIDS005482 Penicillin deriv.