2,4-DIAZASPIRO(5.5)UNDECANE-1,5-DIONE, 3-THIOXO- 3-Thioxo-2,4-diazaspiro(5.5)undecane-1,5-dione 5-24-09-00222 (Beilstein Handbook Reference) 52-45-9 BRN 0195140 Spiro(cyclohexane-2-thiobarbituric) acid