Carbonyl compounds
Filtered Search Results
3',5'-Dibromo-4'-hydroxyacetophenone 97.0+%, TCI America™
CAS: 2887-72-1 Molecular Formula: C8H6Br2O2 Molecular Weight (g/mol): 293.94 MDL Number: MFCD00075779 InChI Key: ZNWPTJSBHHIXLJ-UHFFFAOYSA-N PubChem CID: 76158 IUPAC Name: 1-(3,5-dibromo-4-hydroxyphenyl)ethan-1-one SMILES: CC(=O)C1=CC(Br)=C(O)C(Br)=C1
| PubChem CID | 76158 |
|---|---|
| CAS | 2887-72-1 |
| Molecular Weight (g/mol) | 293.94 |
| MDL Number | MFCD00075779 |
| SMILES | CC(=O)C1=CC(Br)=C(O)C(Br)=C1 |
| IUPAC Name | 1-(3,5-dibromo-4-hydroxyphenyl)ethan-1-one |
| InChI Key | ZNWPTJSBHHIXLJ-UHFFFAOYSA-N |
| Molecular Formula | C8H6Br2O2 |
Adrenalone Hydrochloride Hydrate 98.0+%, TCI America™
CAS: 62-13-5 Molecular Formula: C9H12ClNO3 Molecular Weight (g/mol): 217.649 MDL Number: MFCD00035075 InChI Key: CSRRBDMYOUQTCO-UHFFFAOYSA-N Synonym: adrenalone hydrochloride,stryphnonasal,adrenone hydrochloride,adrenalone hcl,kephrine hydrochloride,adrenalonium chloratum,epinephrine ketone hydrochloride,3',4'-dihydroxy-2-methylamino acetophenone hydrochloride,unii-nn82ywe2ic PubChem CID: 66136 IUPAC Name: 1-(3,4-dihydroxyphenyl)-2-(methylamino)ethanone;hydrochloride SMILES: CNCC(=O)C1=CC(=C(C=C1)O)O.Cl
| PubChem CID | 66136 |
|---|---|
| CAS | 62-13-5 |
| Molecular Weight (g/mol) | 217.649 |
| MDL Number | MFCD00035075 |
| SMILES | CNCC(=O)C1=CC(=C(C=C1)O)O.Cl |
| Synonym | adrenalone hydrochloride,stryphnonasal,adrenone hydrochloride,adrenalone hcl,kephrine hydrochloride,adrenalonium chloratum,epinephrine ketone hydrochloride,3',4'-dihydroxy-2-methylamino acetophenone hydrochloride,unii-nn82ywe2ic |
| IUPAC Name | 1-(3,4-dihydroxyphenyl)-2-(methylamino)ethanone;hydrochloride |
| InChI Key | CSRRBDMYOUQTCO-UHFFFAOYSA-N |
| Molecular Formula | C9H12ClNO3 |
2',4'-Dihydroxypropiophenone 98.0+%, TCI America™
CAS: 5792-36-9 Molecular Formula: C9H10O3 Molecular Weight (g/mol): 166.176 MDL Number: MFCD00002280 InChI Key: LLBBBYLDTDJMNU-UHFFFAOYSA-N Synonym: 2',4'-dihydroxypropiophenone,1-2,4-dihydroxyphenyl propan-1-one,2,4-dihydroxypropiophenone,4-propionylresorcinol,1-propanone, 1-2,4-dihydroxyphenyl,respropiophenone,resorcinol fragment, 9,acmc-209m1c,2',4'-dihydroxy-propiophenone,2/',4/'-dihydroxypropiophenone PubChem CID: 79856 IUPAC Name: 1-(2,4-dihydroxyphenyl)propan-1-one SMILES: CCC(=O)C1=C(C=C(C=C1)O)O
| PubChem CID | 79856 |
|---|---|
| CAS | 5792-36-9 |
| Molecular Weight (g/mol) | 166.176 |
| MDL Number | MFCD00002280 |
| SMILES | CCC(=O)C1=C(C=C(C=C1)O)O |
| Synonym | 2',4'-dihydroxypropiophenone,1-2,4-dihydroxyphenyl propan-1-one,2,4-dihydroxypropiophenone,4-propionylresorcinol,1-propanone, 1-2,4-dihydroxyphenyl,respropiophenone,resorcinol fragment, 9,acmc-209m1c,2',4'-dihydroxy-propiophenone,2/',4/'-dihydroxypropiophenone |
| IUPAC Name | 1-(2,4-dihydroxyphenyl)propan-1-one |
| InChI Key | LLBBBYLDTDJMNU-UHFFFAOYSA-N |
| Molecular Formula | C9H10O3 |
3-Methyl-2-oxovaleric Acid 95.0+%, TCI America™
CAS: 1460-34-0 Molecular Formula: C6H10O3 Molecular Weight (g/mol): 130.143 MDL Number: MFCD00002582 InChI Key: JVQYSWDUAOAHFM-UHFFFAOYSA-N Synonym: 3-Methyl-2-oxopentanoic Acid PubChem CID: 47 ChEBI: CHEBI:35932 IUPAC Name: 3-methyl-2-oxopentanoic acid SMILES: CCC(C)C(=O)C(=O)O
| PubChem CID | 47 |
|---|---|
| CAS | 1460-34-0 |
| Molecular Weight (g/mol) | 130.143 |
| ChEBI | CHEBI:35932 |
| MDL Number | MFCD00002582 |
| SMILES | CCC(C)C(=O)C(=O)O |
| Synonym | 3-Methyl-2-oxopentanoic Acid |
| IUPAC Name | 3-methyl-2-oxopentanoic acid |
| InChI Key | JVQYSWDUAOAHFM-UHFFFAOYSA-N |
| Molecular Formula | C6H10O3 |
2-Bromo-3-pentanone 95.0+%, TCI America™
CAS: 815-52-1 Molecular Formula: C5H9BrO Molecular Weight (g/mol): 165.03 MDL Number: MFCD11036312 InChI Key: VUDTYIUNUSPULX-UHFFFAOYSA-N PubChem CID: 545092 IUPAC Name: 2-bromopentan-3-one SMILES: CCC(=O)C(C)Br
| PubChem CID | 545092 |
|---|---|
| CAS | 815-52-1 |
| Molecular Weight (g/mol) | 165.03 |
| MDL Number | MFCD11036312 |
| SMILES | CCC(=O)C(C)Br |
| IUPAC Name | 2-bromopentan-3-one |
| InChI Key | VUDTYIUNUSPULX-UHFFFAOYSA-N |
| Molecular Formula | C5H9BrO |
2'-Methoxyacetophenone 97.0+%, TCI America™
CAS: 579-74-8 Molecular Formula: C9H10O2 Molecular Weight (g/mol): 150.18 MDL Number: MFCD00008725 InChI Key: DWPLEOPKBWNPQV-UHFFFAOYSA-N Synonym: 2'-methoxyacetophenone,1-2-methoxyphenyl ethanone,o-methoxyacetophenone,ethanone, 1-2-methoxyphenyl,o-acetylanisole,1-2-methoxyphenyl ethan-1-one,o-acetanisole,2-acetylanisole,2-methyoxyacetophenone oxime,ortho-methoxyacetophenone PubChem CID: 68481 IUPAC Name: 1-(2-methoxyphenyl)ethan-1-one SMILES: COC1=CC=CC=C1C(C)=O
| PubChem CID | 68481 |
|---|---|
| CAS | 579-74-8 |
| Molecular Weight (g/mol) | 150.18 |
| MDL Number | MFCD00008725 |
| SMILES | COC1=CC=CC=C1C(C)=O |
| Synonym | 2'-methoxyacetophenone,1-2-methoxyphenyl ethanone,o-methoxyacetophenone,ethanone, 1-2-methoxyphenyl,o-acetylanisole,1-2-methoxyphenyl ethan-1-one,o-acetanisole,2-acetylanisole,2-methyoxyacetophenone oxime,ortho-methoxyacetophenone |
| IUPAC Name | 1-(2-methoxyphenyl)ethan-1-one |
| InChI Key | DWPLEOPKBWNPQV-UHFFFAOYSA-N |
| Molecular Formula | C9H10O2 |
Ethyl (4-Nitrobenzoyl)acetate 98.0+%, TCI America™
CAS: 838-57-3 Molecular Formula: C11H11NO5 Molecular Weight (g/mol): 237.211 MDL Number: MFCD00007357 InChI Key: NGRXSVFCLHVGKU-UHFFFAOYSA-N Synonym: ethyl 4-nitrobenzoylacetate,ethyl 3-4-nitrophenyl-3-oxopropanoate,ethyl p-nitrobenzoyl acetate,ethyl 4-nitrobenzoyl acetate,p-nitrobenzoyl acetic acid ethyl ester,ethyl p-nitrobenzoylacetate,4-nitrobenzoylacetic acid ethyl ester,ethyl 4-nitro-beta-oxobenzenepropanoate,4-nitrobenzoyl acetic acid ethyl ester,benzenepropanoic acid, 4-nitro-beta-oxo-, ethyl ester PubChem CID: 13281 IUPAC Name: ethyl 3-(4-nitrophenyl)-3-oxopropanoate SMILES: CCOC(=O)CC(=O)C1=CC=C(C=C1)[N+](=O)[O-]
| PubChem CID | 13281 |
|---|---|
| CAS | 838-57-3 |
| Molecular Weight (g/mol) | 237.211 |
| MDL Number | MFCD00007357 |
| SMILES | CCOC(=O)CC(=O)C1=CC=C(C=C1)[N+](=O)[O-] |
| Synonym | ethyl 4-nitrobenzoylacetate,ethyl 3-4-nitrophenyl-3-oxopropanoate,ethyl p-nitrobenzoyl acetate,ethyl 4-nitrobenzoyl acetate,p-nitrobenzoyl acetic acid ethyl ester,ethyl p-nitrobenzoylacetate,4-nitrobenzoylacetic acid ethyl ester,ethyl 4-nitro-beta-oxobenzenepropanoate,4-nitrobenzoyl acetic acid ethyl ester,benzenepropanoic acid, 4-nitro-beta-oxo-, ethyl ester |
| IUPAC Name | ethyl 3-(4-nitrophenyl)-3-oxopropanoate |
| InChI Key | NGRXSVFCLHVGKU-UHFFFAOYSA-N |
| Molecular Formula | C11H11NO5 |
3-Acetyl-2,5-dichlorothiophene 98.0+%, TCI America™
CAS: 36157-40-1 Molecular Formula: C6H4Cl2OS Molecular Weight (g/mol): 195.057 MDL Number: MFCD00014522 InChI Key: GYFDNIRENHZKGR-UHFFFAOYSA-N Synonym: 3-acetyl-2,5-dichlorothiophene,1-2,5-dichlorothiophen-3-yl ethanone,1-2,5-dichloro-3-thienyl ethan-1-one,1-2,5-dichlorothiophen-3-yl ethan-1-one,1-2,5-dichloro-3-thienyl ethanone,2,5-dichloro-3-thienyl methyl ketone,ethanone, 1-2,5-dichloro-3-thienyl,1-2,5-dichloro-thiophen-3-yl-ethanone,1-2,5-dichlorothien-3-yl ethan-1-one,zlchem 481 PubChem CID: 118920 IUPAC Name: 1-(2,5-dichlorothiophen-3-yl)ethanone SMILES: CC(=O)C1=C(SC(=C1)Cl)Cl
| PubChem CID | 118920 |
|---|---|
| CAS | 36157-40-1 |
| Molecular Weight (g/mol) | 195.057 |
| MDL Number | MFCD00014522 |
| SMILES | CC(=O)C1=C(SC(=C1)Cl)Cl |
| Synonym | 3-acetyl-2,5-dichlorothiophene,1-2,5-dichlorothiophen-3-yl ethanone,1-2,5-dichloro-3-thienyl ethan-1-one,1-2,5-dichlorothiophen-3-yl ethan-1-one,1-2,5-dichloro-3-thienyl ethanone,2,5-dichloro-3-thienyl methyl ketone,ethanone, 1-2,5-dichloro-3-thienyl,1-2,5-dichloro-thiophen-3-yl-ethanone,1-2,5-dichlorothien-3-yl ethan-1-one,zlchem 481 |
| IUPAC Name | 1-(2,5-dichlorothiophen-3-yl)ethanone |
| InChI Key | GYFDNIRENHZKGR-UHFFFAOYSA-N |
| Molecular Formula | C6H4Cl2OS |
3'-Methoxyphenacyl Bromide 98.0+%, TCI America™
CAS: 5000-65-7 Molecular Formula: C9H9BrO2 Molecular Weight (g/mol): 229.073 MDL Number: MFCD00000199 InChI Key: IOOHBIFQNQQUFI-UHFFFAOYSA-N Synonym: 2-bromo-1-3-methoxyphenyl ethanone,2-bromo-3'-methoxyacetophenone,m-methoxyphenacyl bromide,3'-methoxyphenacyl bromide,3-bromoacetyl anisole,2-bromo-1-3-methoxyphenyl ethan-1-one,3-methoxyphenacyl bromide,bromomethyl 3-methoxyphenyl ketone,ccris 7998,3-methoxyphenacylbromide PubChem CID: 101294 IUPAC Name: 2-bromo-1-(3-methoxyphenyl)ethanone SMILES: COC1=CC=CC(=C1)C(=O)CBr
| PubChem CID | 101294 |
|---|---|
| CAS | 5000-65-7 |
| Molecular Weight (g/mol) | 229.073 |
| MDL Number | MFCD00000199 |
| SMILES | COC1=CC=CC(=C1)C(=O)CBr |
| Synonym | 2-bromo-1-3-methoxyphenyl ethanone,2-bromo-3'-methoxyacetophenone,m-methoxyphenacyl bromide,3'-methoxyphenacyl bromide,3-bromoacetyl anisole,2-bromo-1-3-methoxyphenyl ethan-1-one,3-methoxyphenacyl bromide,bromomethyl 3-methoxyphenyl ketone,ccris 7998,3-methoxyphenacylbromide |
| IUPAC Name | 2-bromo-1-(3-methoxyphenyl)ethanone |
| InChI Key | IOOHBIFQNQQUFI-UHFFFAOYSA-N |
| Molecular Formula | C9H9BrO2 |
Sodium Anthraquinone-2-sulfonate Monohydrate 98.0+%, TCI America™
CAS: 153277-35-1 Molecular Formula: C14H7NaO5S Molecular Weight (g/mol): 310.25 MDL Number: MFCD00001229 InChI Key: GGCZERPQGJTIQP-UHFFFAOYSA-M Synonym: sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate hydrate,anthraquinone-2-sulfonic acid sodium salt monohydrate,sodium anthraquinone-2-sulfonate monohydrate,sodium 9,10-dioxoanthracene-2-sulfonate hydrate,9,10-anthraquinone-2-sulfonic acid sodium salt hydrate,anthraquinone-2-sulfonic acid, sodium salt, monohydrate,9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt,acmc-209bkc,c14h8o5s.na.h2o,anthraquinone-2-sulfonic acid sodium salt hydrate PubChem CID: 23666331 IUPAC Name: sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate SMILES: [Na+].[O-]S(=O)(=O)C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1
| PubChem CID | 23666331 |
|---|---|
| CAS | 153277-35-1 |
| Molecular Weight (g/mol) | 310.25 |
| MDL Number | MFCD00001229 |
| SMILES | [Na+].[O-]S(=O)(=O)C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 |
| Synonym | sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate hydrate,anthraquinone-2-sulfonic acid sodium salt monohydrate,sodium anthraquinone-2-sulfonate monohydrate,sodium 9,10-dioxoanthracene-2-sulfonate hydrate,9,10-anthraquinone-2-sulfonic acid sodium salt hydrate,anthraquinone-2-sulfonic acid, sodium salt, monohydrate,9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt,acmc-209bkc,c14h8o5s.na.h2o,anthraquinone-2-sulfonic acid sodium salt hydrate |
| IUPAC Name | sodium 9,10-dioxo-9,10-dihydroanthracene-2-sulfonate |
| InChI Key | GGCZERPQGJTIQP-UHFFFAOYSA-M |
| Molecular Formula | C14H7NaO5S |
(4-Acetylphenoxy)acetic Acid 98.0+%, TCI America™
CAS: 1878-81-5 Molecular Formula: C10H10O4 Molecular Weight (g/mol): 194.19 MDL Number: MFCD00014363 InChI Key: KMXZEXUYXUMHEQ-UHFFFAOYSA-N Synonym: 4-acetylphenoxyacetic acid,2-4-acetylphenoxy acetic acid,4-acetylphenoxy acetic acid,p-acetylphenoxy acetic acid,p-acetylphenoxyacetic acid,chembl84623,4-acetyl-phenoxy-acetic acid,acetic acid, 4-acetylphenoxy,acetic acid,2-4-acetylphenoxy PubChem CID: 74655 IUPAC Name: 2-(4-acetylphenoxy)acetic acid SMILES: CC(=O)C1=CC=C(OCC(O)=O)C=C1
| PubChem CID | 74655 |
|---|---|
| CAS | 1878-81-5 |
| Molecular Weight (g/mol) | 194.19 |
| MDL Number | MFCD00014363 |
| SMILES | CC(=O)C1=CC=C(OCC(O)=O)C=C1 |
| Synonym | 4-acetylphenoxyacetic acid,2-4-acetylphenoxy acetic acid,4-acetylphenoxy acetic acid,p-acetylphenoxy acetic acid,p-acetylphenoxyacetic acid,chembl84623,4-acetyl-phenoxy-acetic acid,acetic acid, 4-acetylphenoxy,acetic acid,2-4-acetylphenoxy |
| IUPAC Name | 2-(4-acetylphenoxy)acetic acid |
| InChI Key | KMXZEXUYXUMHEQ-UHFFFAOYSA-N |
| Molecular Formula | C10H10O4 |
2-Bromo-2'-nitroacetophenone 98.0+%, TCI America™
CAS: 6851-99-6 Molecular Formula: C8H6BrNO3 Molecular Weight (g/mol): 244.044 MDL Number: MFCD00010294 InChI Key: SGXUUCSRVVSMGK-UHFFFAOYSA-N Synonym: 2-bromo-2'-nitroacetophenone,2'-nitrophenacyl bromide,2-bromo-1-2-nitrophenyl ethanone,2-nitrophenacyl bromide,2-bromo-1-2-nitro-phenyl-ethanone,o-nitrophenacyl bromide,o-nitrophenethyl bromide,2-o-nitrophenyl ethyl bromide,2-bromo-1-2-nitrophenyl ethan-1-one,ethanone, 2-bromo-1-2-nitrophenyl PubChem CID: 244025 IUPAC Name: 2-bromo-1-(2-nitrophenyl)ethanone SMILES: C1=CC=C(C(=C1)C(=O)CBr)[N+](=O)[O-]
| PubChem CID | 244025 |
|---|---|
| CAS | 6851-99-6 |
| Molecular Weight (g/mol) | 244.044 |
| MDL Number | MFCD00010294 |
| SMILES | C1=CC=C(C(=C1)C(=O)CBr)[N+](=O)[O-] |
| Synonym | 2-bromo-2'-nitroacetophenone,2'-nitrophenacyl bromide,2-bromo-1-2-nitrophenyl ethanone,2-nitrophenacyl bromide,2-bromo-1-2-nitro-phenyl-ethanone,o-nitrophenacyl bromide,o-nitrophenethyl bromide,2-o-nitrophenyl ethyl bromide,2-bromo-1-2-nitrophenyl ethan-1-one,ethanone, 2-bromo-1-2-nitrophenyl |
| IUPAC Name | 2-bromo-1-(2-nitrophenyl)ethanone |
| InChI Key | SGXUUCSRVVSMGK-UHFFFAOYSA-N |
| Molecular Formula | C8H6BrNO3 |
Methyl Undecafluoroamyl Ketone 98.0+%, TCI America™
CAS: 2708-07-8 Molecular Formula: C7H3F11O Molecular Weight (g/mol): 312.08 MDL Number: MFCD02093506 InChI Key: HWGNOHFZECDUBX-UHFFFAOYSA-N Synonym: 1H,1H,1H-Undecafluoro-2-heptanone, Methyl Perfluoropentyl Ketone, 3,3,4,4,5,5,6,6,7,7,7-Undecafluoro-2-heptanone, Methyl Perfluoroamyl Ketone, Methyl Undecafluoropentyl Ketone PubChem CID: 15859812 IUPAC Name: 3,3,4,4,5,5,6,6,7,7,7-undecafluoroheptan-2-one SMILES: CC(=O)C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F
| PubChem CID | 15859812 |
|---|---|
| CAS | 2708-07-8 |
| Molecular Weight (g/mol) | 312.08 |
| MDL Number | MFCD02093506 |
| SMILES | CC(=O)C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F |
| Synonym | 1H,1H,1H-Undecafluoro-2-heptanone, Methyl Perfluoropentyl Ketone, 3,3,4,4,5,5,6,6,7,7,7-Undecafluoro-2-heptanone, Methyl Perfluoroamyl Ketone, Methyl Undecafluoropentyl Ketone |
| IUPAC Name | 3,3,4,4,5,5,6,6,7,7,7-undecafluoroheptan-2-one |
| InChI Key | HWGNOHFZECDUBX-UHFFFAOYSA-N |
| Molecular Formula | C7H3F11O |
6-Hydroxy-3-coumaranone 97.0+%, TCI America™
CAS: 6272-26-0 Molecular Formula: C8H6O3 Molecular Weight (g/mol): 150.13 MDL Number: MFCD00068174 InChI Key: GBDMODVZBPFQKI-UHFFFAOYSA-N Synonym: 6-hydroxybenzofuran-3 2h-one,6-hydroxy-2h-benzofuran-3-one,6-hydroxy-2,3-dihydrobenzo b furan-3-one,6-hydroxy-1-benzofuran-3 2h-one,6-hydroxybenzofuran-3-one,3 2h-benzofuranone, 6-hydroxy,6-hydroxy-3-coumaranone,6-hydroxy-2,3-dihydro-1-benzofuran-3-one,6-hydroxy-3 2h-benzofuranone,6-hydroxy-2h-1-benzofuran-3-one PubChem CID: 235717 IUPAC Name: 6-hydroxy-2,3-dihydro-1-benzofuran-3-one SMILES: OC1=CC=C2C(=O)COC2=C1
| PubChem CID | 235717 |
|---|---|
| CAS | 6272-26-0 |
| Molecular Weight (g/mol) | 150.13 |
| MDL Number | MFCD00068174 |
| SMILES | OC1=CC=C2C(=O)COC2=C1 |
| Synonym | 6-hydroxybenzofuran-3 2h-one,6-hydroxy-2h-benzofuran-3-one,6-hydroxy-2,3-dihydrobenzo b furan-3-one,6-hydroxy-1-benzofuran-3 2h-one,6-hydroxybenzofuran-3-one,3 2h-benzofuranone, 6-hydroxy,6-hydroxy-3-coumaranone,6-hydroxy-2,3-dihydro-1-benzofuran-3-one,6-hydroxy-3 2h-benzofuranone,6-hydroxy-2h-1-benzofuran-3-one |
| IUPAC Name | 6-hydroxy-2,3-dihydro-1-benzofuran-3-one |
| InChI Key | GBDMODVZBPFQKI-UHFFFAOYSA-N |
| Molecular Formula | C8H6O3 |
2-Bromophenacyl Bromide 97.0+%, TCI America™
CAS: 49851-55-0 Molecular Formula: C8H6Br2O Molecular Weight (g/mol): 277.943 MDL Number: MFCD00044660 InChI Key: LAXPJIJQTHJGCK-UHFFFAOYSA-N PubChem CID: 2737522 IUPAC Name: 2-bromo-1-(2-bromophenyl)ethanone SMILES: C1=CC=C(C(=C1)C(=O)CBr)Br
| PubChem CID | 2737522 |
|---|---|
| CAS | 49851-55-0 |
| Molecular Weight (g/mol) | 277.943 |
| MDL Number | MFCD00044660 |
| SMILES | C1=CC=C(C(=C1)C(=O)CBr)Br |
| IUPAC Name | 2-bromo-1-(2-bromophenyl)ethanone |
| InChI Key | LAXPJIJQTHJGCK-UHFFFAOYSA-N |
| Molecular Formula | C8H6Br2O |