3',4'-Dihydrospiro(imidazolidine-4,2'(1'H)-naphthalen)-5-one hydrochloride 7,8-Benzo-1,3-diazaspiro(4.5)decane-4-one hydrochloride S.2-913 Spiro(imidazolidine-4,2'(1'H)-naphthalene)-5-one, 3',4'-dihydro-, hydrochloride WH1312300