2,4-Diazaspiro(5.5)undecane-1,3,5-trione, 7-isopropyl- 4-24-00-02024 (Beilstein Handbook Reference) 67196-31-0 7-Isopropyl-2,4-diazaspiro(5.5)undecane-1,3,5-trione BRN 0221986