1,3-Dichloro-5-ethyl-5-methylhydantoin89415-87-2100 % similar 1,3-Dichloro-5,5-dimethylhydantoin118-52-556 % similar 1-Bromo-3-chloro-5,5-dimethylhydantoin16079-88-245 % similar 3-Bromo-1-chloro-5,5-dimethylhydantoin126-06-742 % similar