1,3-Diazaspiro(4.5)decane-2,4-dione, 6-(ethoxycarbonyl)- 1,3-Diazaspiro(4.5)decane-6-carboxylic acid, 2,4-dioxo-, ethyl ester 1-(Ethoxycarbonyl)cyclohexanespiro-5'-hydantoin 1975-87-7 5-25-08-00291 (Beilstein Handbook Reference) BRN 0889851