1,3-Dichloro-5,5-dimethylhydantoin118-52-5100 % similar 3-Bromo-1-chloro-5,5-dimethylhydantoin126-06-763 % similar 1-Bromo-3-chloro-5,5-dimethylhydantoin16079-88-261 % similar 1,3-Dichloro-5-ethyl-5-methylhydantoin89415-87-256 % similar Dbdmh77-48-541 % similar