142780-80-1 2-Thiazolidineacetic acid, 4,4'-[1,2-ethanediylbis(iminocarbonyl)]bis[5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-, dimethyl ester, [2R-[2.alpha.(R*),4.beta.[2'R*(R*),4'S*]]]- AIDS-005366 AIDS005366 Penicillin Et(NH)2 Sym dimer [2R-[2.alpha.(R*),4.beta.]]-4,4'-[1,2-Ethanediylbis[aminocarbonyl]]bis[5,5-dimethyl-.alpha.[(phenylacetyl)amino]-2-thiazolidineacetic acid, methyl ester]