Mephenytoin (racemate) is a hydantoin used as a CYP2C19 substrate and an anticonvulsant. It was introduced in the late 1940s, approximately 10 years after phenytoin. However, Mephenytoin is no longer available in the US or the UK. It is still studied largely because of its interesting hydroxylation polymorphism.

纯度：≥98%

CAS：50-12-4