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3-Methylpyridazine

5-(4-Hydroxyphenyl)-5-phenylhydantoin

5,5-Diphenyl-2-thiohydantoin

1-(p-Tosyl)-3,4,4-trimethyl-2-imidazolinium iodide

5-Methyl-5-phenylhydantoin

4-(4,5-Dihydro-1H-imidazol-2-yl)phenol

1,3-Diacetyl-2-imidazolidinone

3-Chloroisoquinoline

7-Hydroxyisoquinoline

1,5,5-Trimethylhydantoin

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