Synonyms: Spiro[naphthalene-1(2H),3'-pyrrolidine]-2',5'-dione,1'-[2-(dimethylamino)-1-methylethyl]-3,4-dihydro-, monohydrochloride, (R*,R*)-(9CI); Spiro[naphthalene-1(2H),3'-pyrrolidine]-2',5'-dione,1'-[2-(dimethylamino)-1-methylethyl]-3,4-dihydro-, monohydrochloride, (R*,R*)-(?à)-