142762-73-0 2-Thiazolidineacetamide, 4,4'-[1,2-ethanediylbis(iminocarbonyl)]bis[N-ethyl-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-, [2R-[2.alpha.(R*),4.beta.[2'R*(R*),4'S*]]]- AIDS-004963 AIDS004963 C2-sym dimer Penicillin Et(NH)2 dimer Penicillin G [2R-[2.alpha.(R*),4.beta.]]-4,4'-[1,2-Ethanediylbis(aminocarbonyl)]bis[N-ethyl-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-2-thiazolidineacetamide]