| Record Information |
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| Version | 5.0 |
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| Status | Detected and Quantified |
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| Creation Date | 2006-05-22 14:18:00 UTC |
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| Update Date | 2023-07-07 20:53:57 UTC |
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| HMDB ID | HMDB0002643 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | HPHPA |
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| Description | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid (HPHPA) is an organic acid detected in human urine. It is relatively abundant in adult human urine and it is normally relatively benign. It is thought that the presence of this acid is from nutritional sources (i.e. dietary phenylalanine or polyphenols). However, there has been a considerable degree of ambiguity in the origin and/or significance of this compound (PMID:11978597 ). Recently, it has been reported that HPHPA is actually an abnormal phenylalanine metabolite arising from bacterial metabolism in the gastrointestinal tract. Specifically, HPHPA appears to arise from the action of the anaerobic bacteria Clostridia sp. (PMID:20423563 ; PMID:24063620 ). Elevated levels of HPHPA have been reported in the urine of children with autism as well as in adult patients with schizophrenia. It has been proposed that HPHPA may be a bacterial metabolite of m-tyrosine, a tyrosine analog that causes symptoms of autism in experimental animals. Under certain conditions, HPHPA can act as a neurotoxin and a metabotoxin. A neurotoxin causes damage to nerve cells and nerve tissues. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of HPHPA are associated with autism and schizophrenia. The mechanism by which HPHPA exerts its toxic effects is not clear. It may function as a catecholamine analog and disrupt catecholamine signalling, especially in younger individuals. Alternately, HPHPA may function as an amino acid analog to tyrosine and phenylalanine. High plasma concentrations of phenylalanine (and possibly HPHPA) are known to influence the blood-brain barrier transport of large neutral amino acids. This altered transport is believed to interfere with the function of different cerebral enzyme systems in the developing brain. Studies have shown that higher levels of HPHPA are associated with overgrowth of Clostridia in the gut, including Clostridium difficile, Clostridium sporogenes, Clostridium botulinum, Clostridium calortolerans, Clostridium mangenoyi, Clostridium ghoni, Clostridium bifermentans, Clostridium sordelli. (PMID:20423563 ; PMID:24063620 ) |
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| Structure | OC(CC(O)=O)C1=CC(O)=CC=C1 InChI=1S/C9H10O4/c10-7-3-1-2-6(4-7)8(11)5-9(12)13/h1-4,8,10-11H,5H2,(H,12,13) |
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| Synonyms | | Value | Source |
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| (3-Hydroxyphenyl)hydracrylic acid | ChEBI | | 3'-Hydroxyphenylhydracrylic acid | ChEBI | | 3-(m-Hydroxyphenyl)hydracrylic acid | ChEBI | | 3-Hydroxyphenyl-hydracrylic acid | ChEBI | | b-(m-Hydroxyphenyl)hydracrylic acid | ChEBI | | beta-(m-Hydroxyphenyl)hydracrylic acid | ChEBI | | HPHPA | ChEBI | | (3-Hydroxyphenyl)hydracrylate | Generator | | 3'-Hydroxyphenylhydracrylate | Generator | | 3-(3-Hydroxyphenyl)-3-hydroxypropionate | Generator | | 3-(3-Hydroxyphenyl)hydracrylate | Generator | | 3-(m-Hydroxyphenyl)hydracrylate | Generator | | 3-Hydroxy-3-(3-hydroxyphenyl)propionate | Generator | | 3-Hydroxyphenyl-hydracrylate | Generator | | b-(m-Hydroxyphenyl)hydracrylate | Generator | | beta-(m-Hydroxyphenyl)hydracrylate | Generator | | Β-(m-hydroxyphenyl)hydracrylate | Generator | | Β-(m-hydroxyphenyl)hydracrylic acid | Generator | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoate | Generator | | HPHPA CPD | HMDB | | beta-(Meta-hydroxyphenyl)hydracrylic acid | HMDB | | MHPHA | HMDB | | 3-Hydroxy-3-(3'-hydroxyphenyl)propanoic acid | HMDB | | 3-Hydroxy-3-(3-hydroxyphenyl)propanoic acid | HMDB |
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| Chemical Formula | C9H10O4 |
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| Average Molecular Weight | 182.1733 |
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| Monoisotopic Molecular Weight | 182.057908808 |
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| IUPAC Name | 3-hydroxy-3-(3-hydroxyphenyl)propanoic acid |
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| Traditional Name | mhpha |
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| CAS Registry Number | 3247-75-4 |
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| SMILES | OC(CC(O)=O)C1=CC(O)=CC=C1 |
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| InChI Identifier | InChI=1S/C9H10O4/c10-7-3-1-2-6(4-7)8(11)5-9(12)13/h1-4,8,10-11H,5H2,(H,12,13) |
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| InChI Key | KHTAGVZHYUZYMF-UHFFFAOYSA-N |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as phenylpropanoic acids. Phenylpropanoic acids are compounds with a structure containing a benzene ring conjugated to a propanoic acid. |
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| Kingdom | Organic compounds |
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| Super Class | Phenylpropanoids and polyketides |
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| Class | Phenylpropanoic acids |
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| Sub Class | Not Available |
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| Direct Parent | Phenylpropanoic acids |
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| Alternative Parents | |
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| Substituents | - 3-phenylpropanoic-acid
- 1-hydroxy-4-unsubstituted benzenoid
- 1-hydroxy-2-unsubstituted benzenoid
- Beta-hydroxy acid
- Phenol
- Monocyclic benzene moiety
- Hydroxy acid
- Benzenoid
- Secondary alcohol
- Carboxylic acid derivative
- Carboxylic acid
- Monocarboxylic acid or derivatives
- Hydrocarbon derivative
- Alcohol
- Carbonyl group
- Organic oxide
- Organic oxygen compound
- Organooxygen compound
- Aromatic alcohol
- Aromatic homomonocyclic compound
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| Molecular Framework | Aromatic homomonocyclic compounds |
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| External Descriptors | |
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| Ontology |
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| Physiological effect | |
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| Disposition | |
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| Process | Not Available |
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| Role | |
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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. | 2.68 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 9.2554 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 2.91 minutes | 32390414 | | AjsUoB = Accucore 150 Amide HILIC with 10mM Ammonium Formate, 0.1% Formic Acid | 83.1 seconds | 40023050 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 1105.3 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 275.3 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 97.3 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 165.6 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 70.4 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 277.2 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 | 294.7 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 230.3 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 631.1 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 192.4 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 | 927.8 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 200.2 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 211.2 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 477.4 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 282.8 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 | 182.3 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TMS,isomer #1 | C[Si](C)(C)OC(CC(=O)O)C1=CC=CC(O)=C1 | 1848.1 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TMS,isomer #2 | C[Si](C)(C)OC(=O)CC(O)C1=CC=CC(O)=C1 | 1879.1 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TMS,isomer #3 | C[Si](C)(C)OC1=CC=CC(C(O)CC(=O)O)=C1 | 1889.4 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TMS,isomer #1 | C[Si](C)(C)OC(=O)CC(O[Si](C)(C)C)C1=CC=CC(O)=C1 | 1844.3 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TMS,isomer #2 | C[Si](C)(C)OC1=CC=CC(C(CC(=O)O)O[Si](C)(C)C)=C1 | 1846.8 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TMS,isomer #3 | C[Si](C)(C)OC(=O)CC(O)C1=CC=CC(O[Si](C)(C)C)=C1 | 1835.8 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,3TMS,isomer #1 | C[Si](C)(C)OC(=O)CC(O[Si](C)(C)C)C1=CC=CC(O[Si](C)(C)C)=C1 | 1844.4 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(CC(=O)O)C1=CC=CC(O)=C1 | 2106.3 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC(=O)CC(O)C1=CC=CC(O)=C1 | 2115.5 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,1TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)OC1=CC=CC(C(O)CC(=O)O)=C1 | 2134.7 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CC(O[Si](C)(C)C(C)(C)C)C1=CC=CC(O)=C1 | 2318.2 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OC1=CC=CC(C(CC(=O)O)O[Si](C)(C)C(C)(C)C)=C1 | 2366.0 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,2TBDMS,isomer #3 | CC(C)(C)[Si](C)(C)OC(=O)CC(O)C1=CC=CC(O[Si](C)(C)C(C)(C)C)=C1 | 2335.5 | Semi standard non polar | 33892256 | | 3-(3-Hydroxyphenyl)-3-hydroxypropanoic acid,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OC(=O)CC(O[Si](C)(C)C(C)(C)C)C1=CC=CC(O[Si](C)(C)C(C)(C)C)=C1 | 2533.0 | Semi standard non polar | 33892256 |
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| GC-MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Predicted GC-MS | Predicted GC-MS Spectrum - HPHPA GC-MS (Non-derivatized) - 70eV, Positive | splash10-00di-6900000000-1c85dbbfd5980c188548 | 2017-07-27 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - HPHPA GC-MS (3 TMS) - 70eV, Positive | splash10-014i-3094000000-b60bebf30bd58b1783a1 | 2017-10-06 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - HPHPA GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - HPHPA 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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| Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 10V, Positive-QTOF | splash10-0159-0900000000-db4168cb272b787d7521 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 20V, Positive-QTOF | splash10-01ba-1900000000-bf141ae9daa7c4c192b4 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 40V, Positive-QTOF | splash10-01b9-6900000000-6baa657777aef17afbb5 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 10V, Negative-QTOF | splash10-001i-1900000000-9e5b5607972b5e60f0ec | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 20V, Negative-QTOF | splash10-07ci-3900000000-d464d54fbcadeb4e4444 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 40V, Negative-QTOF | splash10-052f-9400000000-4de7b48574933f1a2830 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 10V, Positive-QTOF | splash10-01c1-1900000000-79d8859d77850e029ca4 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 20V, Positive-QTOF | splash10-00kb-3900000000-36acb66d08cbc9708189 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 40V, Positive-QTOF | splash10-014j-9100000000-0eae14fd6f9433582771 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 10V, Negative-QTOF | splash10-001i-1900000000-ae7a51ac5fc753f2380d | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 20V, Negative-QTOF | splash10-014i-3900000000-95ac6fbe6696a0e175df | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - HPHPA 40V, Negative-QTOF | splash10-014l-7900000000-52680aaff3251da70f1f | 2021-09-22 | Wishart Lab | View Spectrum |
NMR Spectra| Spectrum Type | Description | Deposition Date | Source | View |
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| Predicted 1D NMR | 1H NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-25 | Wishart Lab | View Spectrum | | Experimental 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, experimental) | 2021-10-10 | Wishart Lab | View Spectrum | | Experimental 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, experimental) | 2021-10-10 | Wishart Lab | View Spectrum | | Experimental 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, experimental) | 2021-10-10 | Wishart Lab | View Spectrum | | Experimental 2D NMR | [1H, 13C]-HSQC NMR Spectrum (2D, 500 MHz, H2O, experimental) | 2012-12-05 | 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+Na]+) | 2023-02-03 | FELIX lab | View Spectrum |
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