hydantoin
乙內惙惙
hy·dan·to·in /haɪˈdæntəwən/ 名詞
Hy·dan·to·in n. Chem. A derivative of urea, C3H4N2O2, obtained from allantion, as a white, crystalline substance, with a sweetish taste; -- called also glycolyl urea.
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hydantoin
n : any of a group of anticonvulsant drugs used in treating
epilepsy