52094-70-9 7,8-Benzo-1,3-diazaspiro[4.5]decane-2,4-dione Benzo[g]quinazoline-2,4(1H,3H)-dione NSC150464 Spiro[imidazolidine-4,2'(1'H)-naphthalene]-2,5-dione, 3',4'-dihydro- Spirodon Tetraline-(2-spiro-5)-hydantoin Tetrantoin