11-Propyl-2,4-diazaspiro(5.5)undec-8-ene-1,3,5-trione 2,4-Diazaspiro(5.5)undec-8-ene-1,3,5-trione, 11-propyl- 4-24-00-02054 (Beilstein Handbook Reference) 67196-42-3 BRN 0233712