| Record Information |
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| Version | 5.0 |
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| Status | Detected and Quantified |
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| Creation Date | 2005-11-16 15:48:42 UTC |
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| Update Date | 2022-03-07 02:49:00 UTC |
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| HMDB ID | HMDB0000335 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | 16a-Hydroxyestrone |
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| Description | 16a-Hydroxyestrone or 16alpha-hydroxyestrone (16alpha-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 | | 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 | | 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 Molecular Weight | 286.3655 |
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| Monoisotopic Molecular Weight | 286.15689457 |
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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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| 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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| Ontology |
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| Not Available | Not Available |
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| Physical Properties |
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| State | Solid |
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| Experimental Molecular 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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| Experimental Chromatographic Properties | Not Available |
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| Predicted Molecular Properties | |
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| Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Retention Times Underivatized| Chromatographic Method | Retention Time | Reference |
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| Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022. | 6.11 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 12.6744 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 1.42 minutes | 32390414 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 2159.7 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 287.9 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 177.8 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 169.5 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 329.0 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 588.4 seconds | 40023050 | | BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid | 545.7 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 77.7 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 1075.1 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 452.6 seconds | 40023050 | | UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid | 1417.8 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 325.7 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 392.4 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 287.5 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 167.5 seconds | 40023050 | | Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water | 68.3 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| 16a-Hydroxyestrone,1TMS,isomer #1 | C[C@]12CC[C@@H]3C4=CC=C(O)C=C4CC[C@H]3[C@@H]1C[C@@H](O[Si](C)(C)C)C2=O | 2768.0 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,1TMS,isomer #2 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1C[C@@H](O)C2=O | 2786.1 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,1TMS,isomer #3 | C[C@]12CC[C@@H]3C4=CC=C(O)C=C4CC[C@H]3[C@@H]1CC(O)=C2O[Si](C)(C)C | 2768.1 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TMS,isomer #1 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1C[C@@H](O[Si](C)(C)C)C2=O | 2875.1 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TMS,isomer #2 | C[C@]12CC[C@@H]3C4=CC=C(O)C=C4CC[C@H]3[C@@H]1CC(O[Si](C)(C)C)=C2O[Si](C)(C)C | 2779.4 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TMS,isomer #3 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1CC(O)=C2O[Si](C)(C)C | 2839.0 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,3TMS,isomer #1 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1CC(O[Si](C)(C)C)=C2O[Si](C)(C)C | 2905.4 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,3TMS,isomer #1 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1CC(O[Si](C)(C)C)=C2O[Si](C)(C)C | 2783.1 | Standard non polar | 33892256 | | 16a-Hydroxyestrone,3TMS,isomer #1 | C[C@]12CC[C@@H]3C4=CC=C(O[Si](C)(C)C)C=C4CC[C@H]3[C@@H]1CC(O[Si](C)(C)C)=C2O[Si](C)(C)C | 2899.0 | Standard polar | 33892256 | | 16a-Hydroxyestrone,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)O[C@@H]1C[C@H]2[C@@H]3CCC4=CC(O)=CC=C4[C@H]3CC[C@]2(C)C1=O | 3049.5 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC1=CC=C2C(=C1)CC[C@@H]1[C@@H]2CC[C@]2(C)C(=O)[C@H](O)C[C@@H]12 | 3088.5 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,1TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)OC1=C(O)C[C@H]2[C@@H]3CCC4=CC(O)=CC=C4[C@H]3CC[C@]12C | 3043.6 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC1=CC=C2C(=C1)CC[C@@H]1[C@@H]2CC[C@]2(C)C(=O)[C@H](O[Si](C)(C)C(C)(C)C)C[C@@H]12 | 3412.8 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC1=C(O[Si](C)(C)C(C)(C)C)[C@@]2(C)CC[C@@H]3C4=CC=C(O)C=C4CC[C@H]3[C@@H]2C1 | 3287.1 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,2TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)OC1=C(O)C[C@H]2[C@@H]3CCC4=CC(O[Si](C)(C)C(C)(C)C)=CC=C4[C@H]3CC[C@]12C | 3331.5 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC1=C(O[Si](C)(C)C(C)(C)C)[C@@]2(C)CC[C@@H]3C4=CC=C(O[Si](C)(C)C(C)(C)C)C=C4CC[C@H]3[C@@H]2C1 | 3616.3 | Semi standard non polar | 33892256 | | 16a-Hydroxyestrone,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC1=C(O[Si](C)(C)C(C)(C)C)[C@@]2(C)CC[C@@H]3C4=CC=C(O[Si](C)(C)C(C)(C)C)C=C4CC[C@H]3[C@@H]2C1 | 3466.0 | Standard non polar | 33892256 | | 16a-Hydroxyestrone,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC1=C(O[Si](C)(C)C(C)(C)C)[C@@]2(C)CC[C@@H]3C4=CC=C(O[Si](C)(C)C(C)(C)C)C=C4CC[C@H]3[C@@H]2C1 | 3214.0 | Standard polar | 33892256 |
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