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 | 2021-08-19 23:57:58 UTC |
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NP-MRD ID | NP0000239 |
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Secondary Accession Numbers | None |
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Natural Product Identification |
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Common Name | 4-Pyridoxic acid |
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Description | 4-Pyridoxic acid is a member of the class of compounds known as methylpyridines. More specifically it is a 2-methylpyridine derivative substituted by a hydroxy group at C-3, a carboxy group at C-4, and a hydroxymethyl group at C-5. 4-Pyridoxic acid is the catabolic product of vitamin B6 (also known as pyridoxine, pyridoxal and pyradoxamine) and is excreted in the urine. Urinary levels of 4-pyridoxic acid are lower in females than in males and will be reduced even further in persons with a riboflavin deficiency. 4-Pyridoxic acid is formed by the action of aldehyde oxidase I (an endogenous enzyme) and by microbial enzymes (pyridoxal 4-dehydrogenase), an NAD-dependent aldehyde dehydrogenase. 4-Pyridoxic acid can be further broken down by the gut microflora via the enzyme known as 4-pyridoxic acid dehydrogenase. This enzyme catalyzes the four-electron oxidation of 4-pyridoxic acid to 3-hydroxy-2-methylpyridine-4,5-dicarboxylate, using nicotinamide adenine dinucleotide (NAD) as a cofactor. |
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Structure | CC1=NC=C(CO)C(C(O)=O)=C1O InChI=1S/C8H9NO4/c1-4-7(11)6(8(12)13)5(3-10)2-9-4/h2,10-11H,3H2,1H3,(H,12,13) |
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Synonyms | Value | Source |
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2-Methyl-3-hydroxy-4-carboxy-5-hydroxymethylpyridine | ChEBI | 3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylic acid | ChEBI | 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinic acid | ChEBI | 4-Pyridoxinecarboxylic acid | ChEBI | 4-Pyridoxinic acid | ChEBI | 4-Pyridoxinsaeure | ChEBI | 4-Pyridoxylic acid | ChEBI | Pyridoxic acid | ChEBI | 3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylate | Generator | 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinate | Generator | 4-Pyridoxinecarboxylate | Generator | 4-Pyridoxinate | Generator | 4-Pyridoxylate | Generator | Pyridoxate | Generator | 4-Pyridoxate | Generator | 3-Hydroxy-5-(hydroxymethyl)-2-methyl-isonicotinate | HMDB | 3-Hydroxy-5-(hydroxymethyl)-2-methyl-isonicotinic acid | HMDB | 3-Hydroxy-5-hydroxymethyl-2-methyl-isonicotinate | HMDB | 3-Hydroxy-5-hydroxymethyl-2-methyl-isonicotinic acid | HMDB | 3-Hydroxy-5-hydroxymethyl-2-methyl-isonicotinsaeure | HMDB | 4 Pyridoxinic acid | HMDB | Pyridoxinecarboxylic acid | HMDB | 4 Pyridoxylic acid | HMDB | 4 Pyridoxic acid | HMDB |
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Chemical Formula | C8H9NO4 |
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Average Mass | 183.1614 Da |
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Monoisotopic Mass | 183.05316 Da |
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IUPAC Name | 3-hydroxy-5-(hydroxymethyl)-2-methylpyridine-4-carboxylic acid |
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Traditional Name | pyridoxic acid |
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CAS Registry Number | 82-82-6 |
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SMILES | CC1=NC=C(CO)C(C(O)=O)=C1O |
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InChI Identifier | InChI=1S/C8H9NO4/c1-4-7(11)6(8(12)13)5(3-10)2-9-4/h2,10-11H,3H2,1H3,(H,12,13) |
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InChI Key | HXACOUQIXZGNBF-UHFFFAOYSA-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, 500 MHz, H2O, simulated) | V.dorna83 | | | 2021-09-03 | View Spectrum | 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, simulated) | Varshavi.d26 | | | 2021-07-30 | View Spectrum | 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, simulated) | Varshavi.d26 | | | 2021-07-30 | View Spectrum | 2D NMR | [1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, 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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| Spectrum Type | Description | Depositor Email | Depositor Organization | Depositor | Deposition Date | View |
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1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, simulated) | varshavi.d26@gmail.com | Not Available | Not Available | 2021-07-30 | View Spectrum | 1D NMR | 1H NMR Spectrum (1D, 500 MHz, H2O, simulated) | v.dorna83@yahoo.com | Not Available | Not Available | 2021-07-29 | View Spectrum |
| Species |
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Species of Origin | |
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Species Where Detected | |
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Chemical Taxonomy |
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Description | Belongs to the class of organic compounds known as pyridinecarboxylic acids. Pyridinecarboxylic acids are compounds containing a pyridine ring bearing a carboxylic acid group. |
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Kingdom | Organic compounds |
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Super Class | Organoheterocyclic compounds |
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Class | Pyridines and derivatives |
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Sub Class | Pyridinecarboxylic acids and derivatives |
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Direct Parent | Pyridinecarboxylic acids |
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Alternative Parents | |
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Substituents | - Pyridine carboxylic acid
- Hydroxypyridine
- Methylpyridine
- Vinylogous acid
- Heteroaromatic compound
- Azacycle
- Monocarboxylic acid or derivatives
- Carboxylic acid
- Carboxylic acid derivative
- Organic oxygen compound
- Hydrocarbon derivative
- Alcohol
- Aromatic alcohol
- Organic nitrogen compound
- Primary alcohol
- Organooxygen compound
- Organonitrogen compound
- Organopnictogen compound
- Organic oxide
- Aromatic heteromonocyclic compound
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Molecular Framework | Aromatic heteromonocyclic 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 | 247 - 248 °C | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | 4337 mg/L @ 25 °C (est) | The Good Scents Company Information System | LogP | Not Available | Not Available |
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Predicted Properties | |
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General References | - Huang YC, Lan PH, Cheng CH, Lee BJ, Kan MN: Vitamin B6 intakes and status of mechanically ventilated critically ill patients in Taiwan. Eur J Clin Nutr. 2002 May;56(5):387-92. [PubMed:12001008 ]
- Kodentsova VM, Vrzhesinskaia OA, Sokol'nikov AA, Beketova NA, Spirichev VB: [The effect of riboflavin supply on metabolism of water-soluble vitamins]. Vopr Med Khim. 1993 Sep-Oct;39(5):29-33. [PubMed:8279138 ]
- Masse PG, Mahuren JD, Tranchant C, Dosy J: B-6 vitamers and 4-pyridoxic acid in the plasma, erythrocytes, and urine of postmenopausal women. Am J Clin Nutr. 2004 Oct;80(4):946-51. [PubMed:15447904 ]
- Huang YC, Chang HH, Huang SC, Cheng CH, Lee BJ, Cheng SY, Su KH: Plasma pyridoxal 5'-phosphate is a significant indicator of immune responses in the mechanically ventilated critically ill. Nutrition. 2005 Jul-Aug;21(7-8):779-85. [PubMed:15975484 ]
- Ericson KL, Mahuren JD, Zubovic YM, Coburn SP: Use of chlorite to improve HPLC detection of pyridoxal 5'-phosphate. J Chromatogr B Analyt Technol Biomed Life Sci. 2005 Sep 5;823(2):218-20. [PubMed:16054880 ]
- Driskell JA, Chrisley BM: Plasma B-6 vitamer and plasma and urinary 4-pyridoxic acid concentrations in young women as determined using high performance liquid chromatography. Biomed Chromatogr. 1991 Sep;5(5):198-201. [PubMed:1742549 ]
- Chiang EP, Smith DE, Selhub J, Dallal G, Wang YC, Roubenoff R: Inflammation causes tissue-specific depletion of vitamin B6. Arthritis Res Ther. 2005;7(6):R1254-62. Epub 2005 Sep 13. [PubMed:16277678 ]
- Rybak ME, Pfeiffer CM: Clinical analysis of vitamin B(6): determination of pyridoxal 5'-phosphate and 4-pyridoxic acid in human serum by reversed-phase high-performance liquid chromatography with chlorite postcolumn derivatization. Anal Biochem. 2004 Oct 15;333(2):336-44. [PubMed:15450810 ]
- Huang YC, Chang SJ, Chiu YT, Chang HH, Cheng CH: The status of plasma homocysteine and related B-vitamins in healthy young vegetarians and nonvegetarians. Eur J Nutr. 2003 Apr;42(2):84-90. [PubMed:12638029 ]
- Midttun O, Hustad S, Solheim E, Schneede J, Ueland PM: Multianalyte quantification of vitamin B6 and B2 species in the nanomolar range in human plasma by liquid chromatography-tandem mass spectrometry. Clin Chem. 2005 Jul;51(7):1206-16. [PubMed:15976101 ]
- Chang SJ, Huang YC, Hsiao LJ, Lee YC, Hsuen SY: Determination of vitamin B-6 estimated average requirement and recommended dietary allowance for children aged 7-12 years using vitamin B-6 intake, nutritional status and anthropometry. J Nutr. 2002 Oct;132(10):3130-4. [PubMed:12368406 ]
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