AIDS-005374 AIDS005374 Penicillin Et(NH)2 dimer [2R-[2.alpha.(R*),4.beta.]]-4,4'-[1,2-Ethanediylbis[aminocarbonyl]]bis[N-[4-(dimethylamino)benzyl]-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-2-thiazolidineacetamide]