11-Methyl-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-methyl- 4-24-00-02041 (Beilstein Handbook Reference) 67196-39-8 BRN 0199012