5-Hydroxyhydantoin

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| ImageFile = 5-Hydroxyhydantoin.svg

| ImageSize =180px

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| IUPACName = 5-Hydroxy-2,4-imidazolidinedione

| OtherNames = Glyoxalurea; Allanturic acid

| Section1 = {{Chembox Identifiers

| CASNo = 29410-13-7

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 53RWX86RYV

| PubChem = 4157426

| ChemSpiderID = 3369395

| ChEBI = 195336

| SMILES = OC1NC(=O)NC1=O

| InChI=1S/C3H4N2O3/c6-1-2(7)5-3(8)4-1/h1,6H,(H2,4,5,7,8)

| InChIKey = WYLUZALOENCNQU-UHFFFAOYSA-N

| StdInChI=1S/C3H4N2O3/c6-1-2(7)5-3(8)4-1/h1,6H,(H2,4,5,7,8)

| StdInChIKey = WYLUZALOENCNQU-UHFFFAOYSA-N

}}

| Section2 = {{Chembox Properties

| C=3|H=4|N=2|O=3

| Appearance =

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| Section3 = {{Chembox Hazards

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5-Hydroxyhydantoin is an oxidation product of 2′-deoxycytidine. If not repaired, it may be processed by DNA polymerases that induce mutagenic processes.{{cite journal |title=Excision of the oxidatively formed 5-hydroxyhydantoin and 5-hydroxy-5-methylhydantoin pyrimidine lesions by Escherichia coli and Saccharomyces cerevisiae DNA N-glycosylases |date= January 2009|doi=10.1016/j.bbagen.2008.10.001 |pmid=18983898 |volume=1790 |issue=1 |journal=Biochimica et Biophysica Acta (BBA) - General Subjects |pages=16–24|last1=Gasparutto |first1=Didier |last2=Muller |first2=Evelyne |last3=Boiteux |first3=Serge |last4=Cadet |first4=Jean }}