| Record Information |
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| Version | 5.0 |
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| Status | Expected but not Quantified |
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| Creation Date | 2012-09-11 17:51:15 UTC |
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| Update Date | 2022-03-07 02:53:26 UTC |
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| HMDB ID | HMDB0032696 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | Cajanin |
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| Description | Cajanin belongs to the class of organic compounds known as 7-o-methylisoflavones. These are isoflavones with methoxy groups attached to the C7 atom of the isoflavone backbone. Thus, cajanin is considered to be a flavonoid. Cajanin has been detected, but not quantified in, several different foods, such as arabica coffees (Coffea arabica), coffee and coffee products, pigeon peas (Cajanus cajan), pulses, and robusta coffees (Coffea canephora). This could make cajanin a potential biomarker for the consumption of these foods. Based on a literature review very few articles have been published on Cajanin. |
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| Structure | COC1=CC(O)=C2C(=O)C(=COC2=C1)C1=C(O)C=C(O)C=C1 InChI=1S/C16H12O6/c1-21-9-5-13(19)15-14(6-9)22-7-11(16(15)20)10-3-2-8(17)4-12(10)18/h2-7,17-19H,1H3 |
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| Synonyms | | Value | Source |
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| 2',4',5-Trihydroxy-7-methoxyisoflavone | HMDB | | Cajinin | HMDB |
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| Chemical Formula | C16H12O6 |
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| Average Molecular Weight | 300.2629 |
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| Monoisotopic Molecular Weight | 300.063388116 |
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| IUPAC Name | 3-(2,4-dihydroxyphenyl)-5-hydroxy-7-methoxy-4H-chromen-4-one |
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| Traditional Name | cajanin |
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| CAS Registry Number | 32884-36-9 |
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| SMILES | COC1=CC(O)=C2C(=O)C(=COC2=C1)C1=C(O)C=C(O)C=C1 |
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| InChI Identifier | InChI=1S/C16H12O6/c1-21-9-5-13(19)15-14(6-9)22-7-11(16(15)20)10-3-2-8(17)4-12(10)18/h2-7,17-19H,1H3 |
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| InChI Key | ALFNTRJPGFNJQV-UHFFFAOYSA-N |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as 7-o-methylisoflavones. These are isoflavones with methoxy groups attached to the C7 atom of the isoflavone backbone. |
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| Kingdom | Organic compounds |
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| Super Class | Phenylpropanoids and polyketides |
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| Class | Isoflavonoids |
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| Sub Class | O-methylated isoflavonoids |
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| Direct Parent | 7-O-methylisoflavones |
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| Alternative Parents | |
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| Substituents | - 7-o-methylisoflavone
- Isoflavone
- Hydroxyisoflavonoid
- Chromone
- Benzopyran
- 1-benzopyran
- Anisole
- Resorcinol
- 1-hydroxy-4-unsubstituted benzenoid
- 1-hydroxy-2-unsubstituted benzenoid
- Phenol
- Pyranone
- Alkyl aryl ether
- Monocyclic benzene moiety
- Benzenoid
- Pyran
- Vinylogous acid
- Heteroaromatic compound
- Ether
- Oxacycle
- Organoheterocyclic compound
- Organooxygen compound
- Organic oxide
- Organic oxygen compound
- Hydrocarbon derivative
- Aromatic heteropolycyclic compound
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| Molecular Framework | Aromatic heteropolycyclic compounds |
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| External Descriptors | |
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| Ontology |
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| Physiological effect | Not Available |
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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 | 208 - 210 °C | Not Available | | Boiling Point | Not Available | Not Available | | Water Solubility | 147.7 mg/L @ 25 °C (est) | The Good Scents Company Information System | | 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. | 7.09 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 12.3731 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 1.23 minutes | 32390414 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 2085.8 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 287.2 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 140.8 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 171.2 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 364.4 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 598.5 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 | 576.5 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 128.6 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 949.0 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 402.5 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 | 1465.6 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 366.7 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 391.8 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 443.1 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 243.6 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 | 124.8 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| Cajanin,1TMS,isomer #1 | COC1=CC(O[Si](C)(C)C)=C2C(=O)C(C3=CC=C(O)C=C3O)=COC2=C1 | 3084.8 | Semi standard non polar | 33892256 | | Cajanin,1TMS,isomer #2 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O)C=C3O[Si](C)(C)C)=COC2=C1 | 3027.4 | Semi standard non polar | 33892256 | | Cajanin,1TMS,isomer #3 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C)C=C3O)=COC2=C1 | 3080.0 | Semi standard non polar | 33892256 | | Cajanin,2TMS,isomer #1 | COC1=CC(O[Si](C)(C)C)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C)C=C3O)=COC2=C1 | 2955.6 | Semi standard non polar | 33892256 | | Cajanin,2TMS,isomer #2 | COC1=CC(O[Si](C)(C)C)=C2C(=O)C(C3=CC=C(O)C=C3O[Si](C)(C)C)=COC2=C1 | 2929.7 | Semi standard non polar | 33892256 | | Cajanin,2TMS,isomer #3 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C)C=C3O[Si](C)(C)C)=COC2=C1 | 2962.3 | Semi standard non polar | 33892256 | | Cajanin,3TMS,isomer #1 | COC1=CC(O[Si](C)(C)C)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C)C=C3O[Si](C)(C)C)=COC2=C1 | 2891.1 | Semi standard non polar | 33892256 | | Cajanin,1TBDMS,isomer #1 | COC1=CC(O[Si](C)(C)C(C)(C)C)=C2C(=O)C(C3=CC=C(O)C=C3O)=COC2=C1 | 3358.0 | Semi standard non polar | 33892256 | | Cajanin,1TBDMS,isomer #2 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O)C=C3O[Si](C)(C)C(C)(C)C)=COC2=C1 | 3307.2 | Semi standard non polar | 33892256 | | Cajanin,1TBDMS,isomer #3 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C(C)(C)C)C=C3O)=COC2=C1 | 3342.2 | Semi standard non polar | 33892256 | | Cajanin,2TBDMS,isomer #1 | COC1=CC(O[Si](C)(C)C(C)(C)C)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C(C)(C)C)C=C3O)=COC2=C1 | 3484.7 | Semi standard non polar | 33892256 | | Cajanin,2TBDMS,isomer #2 | COC1=CC(O[Si](C)(C)C(C)(C)C)=C2C(=O)C(C3=CC=C(O)C=C3O[Si](C)(C)C(C)(C)C)=COC2=C1 | 3440.6 | Semi standard non polar | 33892256 | | Cajanin,2TBDMS,isomer #3 | COC1=CC(O)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C(C)(C)C)C=C3O[Si](C)(C)C(C)(C)C)=COC2=C1 | 3467.2 | Semi standard non polar | 33892256 | | Cajanin,3TBDMS,isomer #1 | COC1=CC(O[Si](C)(C)C(C)(C)C)=C2C(=O)C(C3=CC=C(O[Si](C)(C)C(C)(C)C)C=C3O[Si](C)(C)C(C)(C)C)=COC2=C1 | 3591.1 | 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 - Cajanin GC-MS (Non-derivatized) - 70eV, Positive | splash10-00di-0591000000-2d725dedc079e3bf5cc4 | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Cajanin GC-MS (3 TMS) - 70eV, Positive | splash10-0fkc-2170950000-8a37dcc2d7e2a3c24a67 | 2017-10-06 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - Cajanin 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 - Cajanin 10V, Positive-QTOF | splash10-0udi-0009000000-9de62c366ea45b58088f | 2016-08-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 20V, Positive-QTOF | splash10-0udi-0019000000-faebb53f0f824f475c3f | 2016-08-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 40V, Positive-QTOF | splash10-0uy0-3790000000-1a6c3965725a8acc1921 | 2016-08-01 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 10V, Negative-QTOF | splash10-0002-0090000000-f9e2a2f74f45fb1e1fe4 | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 20V, Negative-QTOF | splash10-0002-0090000000-85b3c09fa13b64ca415e | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 40V, Negative-QTOF | splash10-0159-3690000000-fcc07e28e468be59704f | 2016-08-03 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 10V, Negative-QTOF | splash10-0002-0090000000-fb4a565723d52a1e4624 | 2021-09-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 20V, Negative-QTOF | splash10-0002-0090000000-fb4a565723d52a1e4624 | 2021-09-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 40V, Negative-QTOF | splash10-00mo-0590000000-c12ad5716ba473535f98 | 2021-09-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 10V, Positive-QTOF | splash10-0udi-0009000000-545fc7c692e0abcd7966 | 2021-09-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 20V, Positive-QTOF | splash10-0udi-0009000000-545fc7c692e0abcd7966 | 2021-09-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Cajanin 40V, Positive-QTOF | splash10-0a7i-0390000000-9e3fdcbbe9204f317f21 | 2021-09-24 | Wishart Lab | View Spectrum |
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