2,4-Imidazolidinedione; derived from urea or from allantoin; the NH–CH2–CO group is prototypical of α-amino acid s. H. derivatives are formed by the reaction of phenylisothiocyanate and a polypeptide. SYN: glycolylurea.
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hy·dan·to·in hī-'dan-tə-wən n
1) a crystalline weakly acidic imidazole derivative C3H4N2O2 with a sweetish taste that is found in beet juice and used in organic synthesis
2) a derivative of hydantoin (as phenytoin)
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hy·dan·to·in (hi-danґto-in) 1. a crystalline base derivable from allantoin: 2. any of a group of anticonvulsants, including phenytoin, ethotoin, and methyphenytoin, containing such a ring structure.
Medical dictionary. 2011.