| Record Information |
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| Version | 5.0 |
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| Status | Expected but not Quantified |
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| Creation Date | 2009-04-06 16:21:04 UTC |
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| Update Date | 2023-02-21 17:17:44 UTC |
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| HMDB ID | HMDB0012210 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | Dihydrolipoate |
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| Description | Dihydrolipoic acid is an organic compound that is the reduced form of lipoic acid. This carboxylic acid features a pair of thiol groups. It is optically active but only the R-enantiomer is biochemically significant. The lipoic acid/dihydrolipoic acid pair participate in a variety of biochemical transformations.( from Wiki). Inside the cell, alpha lipoic acid is readily reduced or broken down to dihydrolipoic acid. Dihydrolipoic acid is even more potent than alpha lipoic acid, neutralizing free radicals, preventing them from causing harm. It directly destroys damaging superoxide radicals, hydroperoxy radicals and hydroxyl radicals. It has been shown in vitro that dihydrolipoate (DL-6,8-dithioloctanoic acid) has antioxidant activity against microsomal lipid peroxidation.Dihydrolipoate is tested for its neuroprotective activity using models of hypoxic and excitotoxic neuronal damage in vitro and rodent models of cerebral ischemia in vivo. Dihydrolipoate, similarly to dimethylthiourea, is able to protect neurons against ischemic damage by diminishing the accumulation of reactive oxygen species within the cerebral tissue.(PMID: 1345759 ). |
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| Structure | InChI=1S/C8H16O2S2/c9-8(10)4-2-1-3-7(12)5-6-11/h7,11-12H,1-6H2,(H,9,10) |
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| Synonyms | | Value | Source |
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| 6,8-Bis-sulfanyloctanoic acid | ChEBI | | 6,8-Dihydrothioctic acid | ChEBI | | 6,8-Dimercapto-octanoic acid | ChEBI | | 6,8-Dimercaptooctanoic acid | ChEBI | | DHLA | ChEBI | | Dihydro-alpha-lipoic acid | ChEBI | | Dihydro-lipoic acid | ChEBI | | Dihydrothioctic acid | ChEBI | | Dihydrolipoic acid | Kegg | | 6,8-Bis-sulfanyloctanoate | Generator | | 6,8-Bis-sulphanyloctanoate | Generator | | 6,8-Bis-sulphanyloctanoic acid | Generator | | 6,8-Dihydrothioctate | Generator | | 6,8-Dimercapto-octanoate | Generator | | 6,8-Dimercaptooctanoate | Generator | | Dihydro-a-lipoate | Generator | | Dihydro-a-lipoic acid | Generator | | Dihydro-alpha-lipoate | Generator | | Dihydro-α-lipoate | Generator | | Dihydro-α-lipoic acid | Generator | | Dihydro-lipoate | Generator | | Dihydrothioctate | Generator | | 6,8-Disulfanyloctanoate | HMDB | | 6,8-Disulfanyloctanoic acid | HMDB | | D,L-Dihydrolipoate | HMDB | | D,L-Dihydrolipoic acid | HMDB | | dihydro-DL-alpha-Lipoate | HMDB | | dihydro-DL-alpha-Lipoic acid | HMDB | | dihydro-Thioctic acid | HMDB | | dihydro-Thiocytic acid | HMDB | | DL-dihydro-a-6-Thioctic acid | HMDB | | DL-dihydro-alpha-6-Thioctic acid | HMDB | | Reduced DL-6,8-thioctic acid | HMDB | | Reduced lipoate | HMDB | | Reduced lipoic acid | HMDB | | Reduced thioctic acid | HMDB | | Dihydrolipoic acid, (+-)-isomer | MeSH, HMDB | | Dihydrolipoic acid, sodium salt | MeSH, HMDB |
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| Chemical Formula | C8H16O2S2 |
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| Average Molecular Weight | 208.341 |
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| Monoisotopic Molecular Weight | 208.059171136 |
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| IUPAC Name | 6,8-disulfanyloctanoic acid |
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| Traditional Name | dihydrolipoic acid |
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| CAS Registry Number | 462-20-4 |
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| SMILES | OC(=O)CCCCC(S)CCS |
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| InChI Identifier | InChI=1S/C8H16O2S2/c9-8(10)4-2-1-3-7(12)5-6-11/h7,11-12H,1-6H2,(H,9,10) |
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| InChI Key | IZFHEQBZOYJLPK-UHFFFAOYSA-N |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as medium-chain fatty acids. These are fatty acids with an aliphatic tail that contains between 4 and 12 carbon atoms. |
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| Kingdom | Organic compounds |
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| Super Class | Lipids and lipid-like molecules |
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| Class | Fatty Acyls |
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| Sub Class | Fatty acids and conjugates |
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| Direct Parent | Medium-chain fatty acids |
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| Alternative Parents | |
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| Substituents | - Medium-chain fatty acid
- Thia fatty acid
- Monocarboxylic acid or derivatives
- Carboxylic acid
- Carboxylic acid derivative
- Alkylthiol
- Organic oxygen compound
- Organic oxide
- Hydrocarbon derivative
- Organosulfur compound
- Organooxygen compound
- Carbonyl group
- Aliphatic acyclic compound
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| Molecular Framework | Aliphatic acyclic 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. | 4.84 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 14.5596 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 2.88 minutes | 32390414 | | AjsUoB = Accucore 150 Amide HILIC with 10mM Ammonium Formate, 0.1% Formic Acid | 30.2 seconds | 40023050 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 2671.1 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 445.5 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 154.4 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 276.6 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 271.4 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 581.5 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 | 701.5 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 436.1 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 1217.9 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 374.6 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 | 1397.4 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 417.3 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 358.8 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 593.3 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 531.2 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 | 193.2 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| Dihydrolipoate,1TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(S)CCS | 1917.3 | Semi standard non polar | 33892256 | | Dihydrolipoate,1TMS,isomer #2 | C[Si](C)(C)SC(CCS)CCCCC(=O)O | 1978.8 | Semi standard non polar | 33892256 | | Dihydrolipoate,1TMS,isomer #3 | C[Si](C)(C)SCCC(S)CCCCC(=O)O | 2027.9 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C | 1994.1 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C | 2009.5 | Standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C | 2285.5 | Standard polar | 33892256 | | Dihydrolipoate,2TMS,isomer #2 | C[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C | 2052.5 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #2 | C[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C | 2010.4 | Standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #2 | C[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C | 2389.1 | Standard polar | 33892256 | | Dihydrolipoate,2TMS,isomer #3 | C[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C | 2127.0 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #3 | C[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C | 2129.4 | Standard non polar | 33892256 | | Dihydrolipoate,2TMS,isomer #3 | C[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C | 2490.6 | Standard polar | 33892256 | | Dihydrolipoate,3TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C)S[Si](C)(C)C | 2171.9 | Semi standard non polar | 33892256 | | Dihydrolipoate,3TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C)S[Si](C)(C)C | 2206.3 | Standard non polar | 33892256 | | Dihydrolipoate,3TMS,isomer #1 | C[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C)S[Si](C)(C)C | 2193.5 | Standard polar | 33892256 | | Dihydrolipoate,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(S)CCS | 2139.8 | Semi standard non polar | 33892256 | | Dihydrolipoate,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)SC(CCS)CCCCC(=O)O | 2211.1 | Semi standard non polar | 33892256 | | Dihydrolipoate,1TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)SCCC(S)CCCCC(=O)O | 2264.2 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C(C)(C)C | 2501.6 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C(C)(C)C | 2446.5 | Standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS)S[Si](C)(C)C(C)(C)C | 2477.7 | Standard polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C(C)(C)C | 2563.6 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C(C)(C)C | 2451.7 | Standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(S)CCS[Si](C)(C)C(C)(C)C | 2576.3 | Standard polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C(C)(C)C | 2647.4 | Semi standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C(C)(C)C | 2558.9 | Standard non polar | 33892256 | | Dihydrolipoate,2TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)SCCC(CCCCC(=O)O)S[Si](C)(C)C(C)(C)C | 2588.8 | Standard polar | 33892256 | | Dihydrolipoate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C(C)(C)C)S[Si](C)(C)C(C)(C)C | 2898.9 | Semi standard non polar | 33892256 | | Dihydrolipoate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C(C)(C)C)S[Si](C)(C)C(C)(C)C | 2816.2 | Standard non polar | 33892256 | | Dihydrolipoate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CCCCC(CCS[Si](C)(C)C(C)(C)C)S[Si](C)(C)C(C)(C)C | 2522.9 | Standard polar | 33892256 |
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| GC-MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Experimental GC-MS | GC-MS Spectrum - Dihydrolipoate GC-EI-TOF (Non-derivatized) | splash10-0007-5920000000-99648df42c67f7327a1d | 2017-09-12 | HMDB team, MONA, MassBank | View Spectrum | | Experimental GC-MS | GC-MS Spectrum - Dihydrolipoate GC-EI-TOF (Non-derivatized) | splash10-0007-5920000000-99648df42c67f7327a1d | 2018-05-18 | HMDB team, MONA, MassBank | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Dihydrolipoate GC-MS (Non-derivatized) - 70eV, Positive | splash10-0kij-5900000000-7564ff734a37b263a7ac | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Dihydrolipoate GC-MS (1 TMS) - 70eV, Positive | splash10-00di-9520000000-35f52ace937d40f6ba6e | 2017-10-06 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Dihydrolipoate GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Dihydrolipoate GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum |
MS/MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Experimental LC-MS/MS | LC-MS/MS Spectrum - Dihydrolipoate 20V, Positive-QTOF | splash10-00di-0900000000-832657635f2c81515eac | 2021-09-20 | HMDB team, MONA | View Spectrum | | Experimental LC-MS/MS | LC-MS/MS Spectrum - Dihydrolipoate 20V, Negative-QTOF | splash10-00di-1900000000-832657635f2c81515eac | 2021-09-20 | HMDB team, MONA | View Spectrum | | Experimental LC-MS/MS | LC-MS/MS Spectrum - Dihydrolipoate 10V, Negative-QTOF | splash10-0ab9-0690000000-bb3d2691ed5ceb749b8c | 2021-09-20 | HMDB team, MONA | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 10V, Positive-QTOF | splash10-0a4l-0920000000-203769a6e5514dfdacce | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 20V, Positive-QTOF | splash10-0bvl-0900000000-e0d6ca4b105aaeae3f10 | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 40V, Positive-QTOF | splash10-06vi-9500000000-30fa7bade921a70952d5 | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 10V, Negative-QTOF | splash10-0ab9-0960000000-352daa80c3d73329d4b8 | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 20V, Negative-QTOF | splash10-0a4i-1930000000-dee930722526f680e10d | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 40V, Negative-QTOF | splash10-053r-9300000000-c53948709f447f46266c | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 10V, Positive-QTOF | splash10-0a4i-0930000000-266230745999efddf6dd | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 20V, Positive-QTOF | splash10-0ufr-2900000000-24ea3b6c12cfdd8e2cac | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 40V, Positive-QTOF | splash10-0006-9300000000-a87ea4acfc88c77960a6 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 10V, Negative-QTOF | splash10-0a4i-0190000000-212b987ce9dfd82aaeb6 | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 20V, Negative-QTOF | splash10-0a4r-3920000000-1948f3bf848db6d6ef45 | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Dihydrolipoate 40V, Negative-QTOF | splash10-001l-9400000000-39e9224d6c07b378fb5a | 2021-09-25 | Wishart Lab | View Spectrum |
IR Spectra| Spectrum Type | Description | Deposition Date | Source | View |
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| Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M-H]-) | 2023-02-03 | FELIX lab | View Spectrum | | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+) | 2023-02-03 | FELIX lab | View Spectrum | | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+) | 2023-02-03 | FELIX lab | View Spectrum |
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