5-(4-Methoxyphenyl)-5-phenylimidazolidine-2,4-dione is a hydantoin derivative structurally analogous to the anticonvulsant phenytoin. It is utilized in research as a potential agent for epilepsy and seizure disorders, functioning by stabilizing neuronal membranes and modulating voltage-gated sodium channels to reduce hyperexcitability in the brain. This compound shows promise in controlling various seizure types and is investigated for applications in neuropathic pain and psychiatric conditions due to its effects on the central nervous system. It serves as an intermediate in synthetic studies, with derivatives explored for better bioavailability and minimized side effects.