Hydantoin Series
 5-Methylhydantoin
 5-Ethylhydantoin
 5-lsopropylhydantoin
 5-(2-Cyanoethyl)-hydantoin
 5-(2-Methylthioethyl)-hydantoin
 5-Phenylhydantoin
 5-(4-Hydroxyphenyl)-hydantoin
5-Benzylhydantoin
5,5-Dimethylhydantoin
5-Beniylidenehydantoun
1-Aminohydantoinhydrochloride
1-Benzyl-5-ethoxyhydantoin
1-Benzylhydahtoin
5-Methyl-5-ethylhydantoin
5-Bromohydantoin
2-Thiohytantoin
3-(3,5-Dichlorophenyl)hydantoin
 Disinfectant series
 Unnatural amino acid
 Special epoxy resin
 Fine chemical series