63990-18-1 7,9-Diazaspiro(4,5)decane-6,8,10-trione, 1-(n-butyl)-4-methyl-, sodium salt Sodium 1-(n-butyl)-4-methyl-7,9-diazaspiro(4.5)decane-6,8,10-trione Sodium spiro(2'-butyl-5'-methylcyclopentane)-5,5-pyrimidine-2,4,6-trione Sodium spiro(2-butyl-5-methylcyclopentane barbiturate)