63990-20-5 7,9-Diazaspiro(4.5)decane-6,8,10-trione, 1-butyl-, sodium salt Sodium 1-n-butyl-7,9-diazaspiro(4.5)decane-6,8,10-trione Sodium spiro(1'-n-butylcyclopentane)-5,5-pyrimidine-2,4,6-trione Sodium spiro(1-(n-butyl)cyclopentane barbiturate)