Ropitoin is an example of an antiarrhythmic hydantoin. It is a hydantoin, similar to phenytoin. Iprodione is a popular fungicide containing the hydantoin group. Methylation of hydantoin yields a variety of derivatives. Methionine is produced industrially via the hydantoin obtained from methional. There is no diagnostic testing that can identify fetal hydantoin syndrome. Examples include carbamide peroxide, allantoin, and hydantoin. Hydantoin, or glycolylurea, can be considered the cyclic form of acylurea. The hydantoin derivative Imiprothrin is a pyrethroid insecticide. Iprodione is a hydantoin fungicide and nematicide. Halogenated hydantoin compounds are also used as biocides. The industrial synthesis combines acrolein, methanethiol, and cyanide, which affords the hydantoin. Dimethylhydantoin (DMH) may refer to any dimethyl derivative of hydantoin, but especially 5,5-dimethylhydantoin. Bicalutamide is a diarylpropionamide while flutamide is a monoarylpropionamide and nilutamide is a hydantoin. Examples of such medications include lithium, hydantoin, isoniazid, glucocorticoids, iodides, bromides, and testosterone.