2,4-Diazaspiro(5.5)undec-8-ene-1,3,5-trione, 8,9,11-trimethyl- 4-24-00-02054 (Beilstein Handbook Reference) 67196-45-6 8,9,11-Trimethyl-2,4-diazaspiro(5.5)undec-8-ene-1,3,5-trione BRN 0224072