3',4'-Dihydrospiro(imidazolidine-4,2'(1'H)-naphthalene)-2,5-dione 4-24-00-01554 (Beilstein Handbook Reference) 52094-70-9 7,6-Benzo-1,3-diazaspiro(4,5)decane-2,4-dione 7,8-Benzo-1,3-diazaspiro(4.5)decane-2,4-dione BRN 0015092 Benzo(g)quinazoline-2,4(1H,3H)-dione (8CI) EINECS 257-658-9 NSC 150464 S.2-676 Spiro(imidazolidine-4,2'(1'H)-naphthalene)-2,5-dione, 3',4'-dihydro- Spirodon Tetraline-(2-spiro-5)-hydantoin Tetrantoin