109402-15-5 3',4'-Dihydro-1-methylspiro(imidazolidine-4,2'(1'H)-naphthalene)-2,5-dione 4-24-00-01554 (Beilstein Handbook Reference) BRN 0018371 S.2-700 Spiro(imidazolidine-4,2'(1'H)-naphthalene)-2,5-dione, 3',4'-dihydro-1-methyl-