63990-11-4 8,10-Diazaspiro(5.5)undecane-7,9,11-trione, 1,5-dimethyl-, sodium salt Sodium 1,5-dimethyl-8,10-diazaspiro(5.5)undecane-7,9,11-trione Sodium spiro(2',6'-dimethylcyclohexane)-5,5-pyrimidine-2,4,6-trione Sodium spiro(2,6-dimethylcyclohexane barbiturate)