1,3-DIAZASPIRO(4.5)DECANE-2,4-DIONE 5,5'-Cyclohexanespirohydantoin 5,5-Pentamethylenehydantoin 5,5-Pentamethylenespirohydantoin 5-24-07-00294 (Beilstein Handbook Reference) 702-62-5 AI3-03731 BRN 0145234 Ba 2840 Cyclohexanespiro-5'-hydantoin EINECS 211-868-7 Hydantoin, 5,5-pentamethylene- Hydantoin, pentamethylene- NSC 16617 NSC 172110 Spiro(cyclohexane-1,5'-hydantoin)