Synonyms: AC1L4LDR;ethyl 4-(2',5'-dioxospiro[8-azabicyclo[3.2.1]octane-3,4'-imidazolidine]-8-yl)butanoate hydrochloride;Spiro(8-azabicyclo(3.2.1)octane-3,4'-imidazolidine)-8-butanoic acid,2',5'-dioxo-, ethyl ester, monohydrochloride, (1alpha,3beta,5alpha)-