142762-74-1 2-Thiazolidineacetamide, 4,4'-[1,2-ethanediylbis(iminocarbonyl)]bis[5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-N-(phenylmethyl)-, [2R-[2.alpha.(R*),4.beta.[2'R*(R*),4'S*]]]- AIDS-004964 AIDS004964 Penicillin Et(NH)2 Sym dimer [2R-[2.alpha.(R*),4.beta.]]-4,4'-[1,2-Ethanediylbis(aminocarbonyl)]bis[N-benzyl-5,5-dimethyl-.alpha.[(phenylacetyl)amino]-2-thiazolidineacetamide]