AIDS-005385 AIDS005385 Penicillin Et(NH2) dimer [2R-[2.alpha.(R*),4.beta.]]-4,4'-[1,2-Ethanediylbis[aminocarbonyl]]-bis[N-ethyl-5,5-dimethyl-.alpha.-[(phenylpropionyl)amino]-2-thiazolidineacetamide]