| Record Information |
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| Version | 2.0 |
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| Created at | 2005-11-16 15:48:42 UTC |
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| Updated at | 2021-08-09 22:32:53 UTC |
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| NP-MRD ID | NP0000285 |
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| Secondary Accession Numbers | None |
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| Natural Product Identification |
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| Common Name | 16a-Hydroxyestrone |
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| Description | 16A-Hydroxyestrone or 16alpha-hydroxyestrone (16α-OH-E1 or 16a OHE1), or hydroxyestrone, is an endogenous steroidal estrogen and a major metabolite of estrone and estradiol. 16A-hydroxyestrone belongs to the class of organic compounds known as estrogens and derivatives. These are steroids with a structure containing a 3-hydroxylated estrane. Thus, 16a-hydroxyestrone is considered to be a steroid molecule. 16A-hydroxyestrone is found in all vertebrates. Vertebrates, especially mammals, metabolizes estrogen into two major pathways and one minor. The two major pathways lead to 2-hydroxyestrone and 16a-hydroxyestrone (2-OHE1 and 16a OHE1 respectively). The minor pathway leads to 4-hydroxyestrone (4-OHE1). 2A-hydroxyestrone is considered to be the good metabolite (PMID: 8943806 ) As 2-hydroxyestrone does not stimulate cell growth and it blocks the action of stronger estrogens that may be carcinogenic. 16A-Hydroxyestrone, on the other hand, has a significantly stronger estrogenic activity, and studies show that it may increase the risk of breast cancer. The binding of 16a-hydroxyestrone to the estrogen receptor is reported to be covalent and irreversible (PMID: 3186693 ). A low urinary ratio of 2-hydroxyestrone to 16-alpha-hydroxyestrone is a strong predictor of breast cancer risk among women (PMID: 19502596 ). |
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| Structure | [H][C@@]12C[C@@H](O)C(=O)[C@@]1(C)CC[C@]1([H])C3=C(CC[C@@]21[H])C=C(O)C=C3 InChI=1S/C18H22O3/c1-18-7-6-13-12-5-3-11(19)8-10(12)2-4-14(13)15(18)9-16(20)17(18)21/h3,5,8,13-16,19-20H,2,4,6-7,9H2,1H3/t13-,14-,15+,16-,18+/m1/s1 |
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| Synonyms | | Value | Source |
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| 16 alpha OHE | ChEBI | | 16alpha-OHE | ChEBI | | 16alpha-OHE1 | ChEBI | | 3,16alpha-Dihydroxy-1,3,5(10)-estratrien-17-one | ChEBI | | 3,16alpha-Dihydroxyestra-1,3,5(10)-trien-17-one | ChEBI | | Estra-1,3,5(10)-triene-3,16alpha-diol-17-one | ChEBI | | 16 a OHE | Generator | | 16 Α ohe | Generator | | 16a-OHE | Generator | | 16Α-ohe | Generator | | 16a-OHE1 | Generator | | 16Α-ohe1 | Generator | | 3,16a-Dihydroxy-1,3,5(10)-estratrien-17-one | Generator | | 3,16Α-dihydroxy-1,3,5(10)-estratrien-17-one | Generator | | 3,16a-Dihydroxyestra-1,3,5(10)-trien-17-one | Generator | | 3,16Α-dihydroxyestra-1,3,5(10)-trien-17-one | Generator | | Estra-1,3,5(10)-triene-3,16a-diol-17-one | Generator | | Estra-1,3,5(10)-triene-3,16α-diol-17-one | Generator | | 16 alpha-Hydroxyestrone | HMDB | | 3,16a-Dihydroxy-estra-1,3,5(10)-trien-17-one | HMDB | | 16 beta-Hydroxyestrone | HMDB | | 16-alpha-Hydroxyestrone | HMDB | | 16-Hydroxyestrone | HMDB |
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| Chemical Formula | C18H22O3 |
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| Average Mass | 286.3655 Da |
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| Monoisotopic Mass | 286.15689 Da |
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| IUPAC Name | (1S,10R,11S,13R,15S)-5,13-dihydroxy-15-methyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadeca-2(7),3,5-trien-14-one |
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| Traditional Name | (1S,10R,11S,13R,15S)-5,13-dihydroxy-15-methyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadeca-2(7),3,5-trien-14-one |
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| CAS Registry Number | 566-76-7 |
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| SMILES | [H][C@@]12C[C@@H](O)C(=O)[C@@]1(C)CC[C@]1([H])C3=C(CC[C@@]21[H])C=C(O)C=C3 |
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| InChI Identifier | InChI=1S/C18H22O3/c1-18-7-6-13-12-5-3-11(19)8-10(12)2-4-14(13)15(18)9-16(20)17(18)21/h3,5,8,13-16,19-20H,2,4,6-7,9H2,1H3/t13-,14-,15+,16-,18+/m1/s1 |
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| InChI Key | WPOCIZJTELRQMF-QFXBJFAPSA-N |
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| Experimental Spectra |
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| | Spectrum Type | Description | Depositor Email | Depositor Organization | Depositor | Deposition Date | View |
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| 1D NMR | 1H NMR Spectrum (1D, 600 MHz, 100%_DMSO, experimental) | Wishart Lab | Wishart Lab | David Wishart | 2021-06-20 | View Spectrum | | 2D NMR | [1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, 100%_DMSO, experimental) | Wishart Lab | Wishart Lab | David Wishart | 2021-06-20 | View Spectrum |
| | Predicted Spectra |
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| Not Available | | Chemical Shift Submissions |
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| Not Available | | Species |
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| Species of Origin | |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as estrogens and derivatives. These are steroids with a structure containing a 3-hydroxylated estrane. |
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| Kingdom | Organic compounds |
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| Super Class | Lipids and lipid-like molecules |
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| Class | Steroids and steroid derivatives |
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| Sub Class | Estrane steroids |
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| Direct Parent | Estrogens and derivatives |
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| Alternative Parents | |
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| Substituents | - Estrogen-skeleton
- 3-hydroxysteroid
- Hydroxysteroid
- 17-oxosteroid
- Oxosteroid
- 16-alpha-hydroxysteroid
- 16-hydroxysteroid
- Phenanthrene
- Tetralin
- 1-hydroxy-2-unsubstituted benzenoid
- Benzenoid
- Cyclic alcohol
- Secondary alcohol
- Ketone
- Carbonyl group
- Organooxygen compound
- Alcohol
- Hydrocarbon derivative
- Organic oxide
- Organic oxygen compound
- Aromatic homopolycyclic compound
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| Molecular Framework | Aromatic homopolycyclic compounds |
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| External Descriptors | |
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| Physical Properties |
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| State | Solid |
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| Experimental Properties | | Property | Value | Reference |
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| Melting Point | Not Available | Not Available | | Boiling Point | Not Available | Not Available | | Water Solubility | Not Available | Not Available | | LogP | Not Available | Not Available |
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| Predicted Properties | |
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