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Record Information
Version1.0
Created at2006-02-22 11:10:26 UTC
Updated at2021-06-29 00:47:13 UTC
NP-MRD IDNP0000047
Secondary Accession NumbersNone
Natural Product Identification
Common NameParaxanthine
DescriptionParaxanthine, also known as p-xanthine, belongs to the class of organic compounds known as xanthines. These are purine derivatives with a ketone group conjugated at carbons 2 and 6 of the purine moiety. Paraxanthine exists in all living organisms, ranging from bacteria to humans. Within humans, paraxanthine participates in a number of enzymatic reactions. In particular, paraxanthine and formaldehyde can be biosynthesized from caffeine; which is catalyzed by the enzyme cytochrome P450 1A2. In addition, paraxanthine and acetyl-CoA can be converted into 5-acetylamino-6-formylamino-3-methyluracil through its interaction with the enzyme arylamine N-acetyltransferase 2. In humans, paraxanthine is involved in caffeine metabolism.
Structure
Thumb
Synonyms
ValueSource
3,7-Dihydro-1,7-dimethyl-1H-purine-2,6-dioneChEBI
p-XanthineChEBI
1,7-Dimethyl-xanthineHMDB
1,7-DimethylxanthineHMDB
Chemical FormulaC7H8N4O2
Average Mass180.1640 Da
Monoisotopic Mass180.06473 Da
IUPAC Name1,7-dimethyl-2,3,6,7-tetrahydro-1H-purine-2,6-dione
Traditional Nameparaxanthine
CAS Registry Number611-59-6
SMILES
CN1C=NC2=C1C(=O)N(C)C(O)=N2
InChI Identifier
InChI=1S/C7H8N4O2/c1-10-3-8-5-4(10)6(12)11(2)7(13)9-5/h3H,1-2H3,(H,9,13)
InChI KeyQUNWUDVFRNGTCO-UHFFFAOYSA-N
Spectra
Spectrum TypeDescriptionDepositor IDDeposition DateView
1D NMR1H NMR Spectrum (1D, 500 MHz, H2O, experimental)Wishart Lab2021-06-20View Spectrum
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Wishart Lab2021-06-20View Spectrum
Species
Species of Origin
Species NameSourceReference
Abelmoschus esculentus
Actinidia chinensis
Agaricus bisporus
Agave
Allium ampeloprasum
Allium ascalonicum
Allium cepa
Allium cepa L.
Allium fistulosum
Allium sativum
Allium schoenoprasum
Allium tuberosum
Aloysia triphylla
Amaranthus
Amelanchier alnifolia
Anacardium occidentale
Ananas comosus
Anas platyrhynchos
Anatidae
Anethum graveolens
Angelica keiskei
Annona cherimola
Annona muricata
Annona reticulata
Annona squamosa
Anser anser
Anthriscus cerefolium
Apium graveolens
Apium graveolens var. dulce
Apium graveolens var. rapaceum
Apium graveolens var. secalinum
Arachis hypogaea
Arctium lappa
Armoracia rusticana
Artemisia dracunculus
Artemisia vulgaris
Artocarpus altilis
Artocarpus heterophyllus
Asparagus officinalis
Attalea speciosa
Auricularia auricula-judae
Auricularia polytricha
Avena sativa L.
Averrhoa carambola
Basella alba
Benincasa hispida
Bertholletia excelsa
Beta vulgaris
Beta vulgaris ssp. cicla
Bison bison
Borago officinalis
Bos taurus
Bos taurus X Bison bison
Brassica alboglabra
Brassica juncea
Brassica napus
Brassica napus var. napus
Brassica oleracea
Brassica oleracea var. botrytis
Brassica oleracea var. capitata
Brassica oleracea var. gemmifera
Brassica oleracea var. gongylodes
Brassica oleracea var. italica
Brassica oleracea var. sabauda
Brassica oleracea var. viridis
Brassica rapa
Brassica rapa ssp. chinensis
Brassica rapa var. pekinensis
Brassica rapa var. rapa
Brassica ruvo
Brosimum alicastrum
Bubalus bubalis
Byrsonima crassifolia
Cajanus cajan
Camellia assamicaKNApSAcK Database
Camellia kissiKNApSAcK Database
Camellia sinensisKNApSAcK Database
Camellia sinensis var. assamicaPlant
Camellia taliensisKNApSAcK Database
Camellia toliensisKNApSAcK Database
Cammellia assamica var.kucha-
Canarium ovatum
Cannabis sativaCannabisDB
      Not Available
Cantharellus cibarius
Capparis spinosa
Capra aegagrus hircus
Capsicum annuum
Capsicum annuum L.
Capsicum annuum var. annuum
Capsicum chinense
Capsicum pubescens
Carica papaya L.
Carissa macrocarpa
Carthamus tinctorius
Carum carvi
Carya
Carya illinoinensis
Castanea
Castanea crenata
Castanea mollissima
Castanea sativa
Ceratonia siliqua
Cervidae
Cervus canadensis
Chamaemelum nobile
Chamerion angustifolium
Chenopodium album
Chenopodium quinoa
Chrysanthemum coronarium
Cicer arietinum
Cichorium endivia
Cichorium intybus
Cinnamomum
Cinnamomum aromaticum
Cinnamomum verum
Cirsium
Citrullus lanatus
Citrus ×limon (L.) Burm. f. (pro sp.)
Citrus aurantiifolia
Citrus latifolia
Citrus limonKNApSAcK Database
Citrus maximaKNApSAcK Database
Citrus paradisiKNApSAcK Database
Citrus reticulata
Citrus X sinensis (L.) Osbeck (pro. sp.)
Cocos nucifera
Coffea arabicaKNApSAcK Database
Coffea arabica L.Plant
Coffea canephoraKNApSAcK Database
Coffea dewevreiKNApSAcK Database
Coffea eugeniodesKNApSAcK Database
Coffea kianjavatensisKNApSAcK Database
Coffea libericaKNApSAcK Database
Coffea racemosaKNApSAcK Database
Coffea salvatrixKNApSAcK Database
Cola sp.KNApSAcK Database
Colocasia esculenta
Columba
Columbidae
Corchorus olitorius
Coriandrum sativum L.
Corylus
Corylus avellana
Crateva religiosa
Crocus sativus
Cucumis melo
Cucumis metuliferus
Cucumis sativus L.
Cucurbita
Cucurbita maxima
Cucurbita moschata
Cuminum cyminum
Curcuma longa
Cydonia oblonga
Cymbopogon citratus
Cynara cardunculus
Cynara scolymus
Daucus carota
Daucus carota ssp. sativus
Dimocarpus longan
Dioscorea
Dioscorea pentaphylla
Diospyros
Diospyros kaki
Diospyros virginiana
Dromaius novaehollandiae
Durio zibethinus
Dysphania ambrosioides
Elaeis
Eleocharis dulcis
Elettaria cardamomum
Empetrum nigrum
Equus caballus
Eragrostis tef
Eriobotrya japonica
Eruca vesicaria subsp. Sativa
Eugenia javanica
Eugenia uniflora
Eutrema japonicum
Fagopyrum esculentum
Fagopyrum tataricum
Fagus
Feijoa sellowiana
Ficus carica
Flammulina velutipes
Foeniculum vulgare
Fragaria x ananassa
Gallus gallus
Garcinia mangostana
Gaylussacia baccata
Ginkgo biloba
Glycine max
Gossypium
Grifola frondosa
Hedysarum alpinum
Helianthus annuus L.
Helianthus tuberosus
Herreania sp.-
Hibiscus sabbariffa
Hippophae rhamnoides
Hordeum vulgare
Hyssopus officinalis L.
Ilex paraguariensisKNApSAcK Database
Illicium verum
Ipomoea aquatica
Ipomoea batatas
Juglans
Juglans ailanthifolia
Juglans cinerea
Juglans nigra L.
Juglans regia
Lablab purpureus
Lactuca sativa
Lagenaria siceraria
Lagopus muta
Lathyrus sativus
Laurus nobilis L.
Lens culinaris
Lentinus edodes
Lepidium sativum
Leporidae
Lepus timidus
Levisticum officinale
Linum usitatissimum
Litchi chinensis
Luffa aegyptiaca
Lupinus
Lupinus albus
Macadamia
Macadamia tetraphylla
Malpighia emarginata
Malus
Malus pumila
Mammea americana
Mangifera indica
Manihot esculenta
Manilkara zapota
Maranta arundinacea
Matricaria recutita
Matteuccia struthiopteris
Medicago sativa
Melanitta fusca
Meleagris gallopavo
Melissa officinalis L.
Mentha
Mentha aquatica
Mentha arvensis
Mentha spicata
Mentha x piperita
Mespilus germanica
Metroxylon sagu
Momordica charantia
Morchellaceae
Morella rubra
Moringa oleifera
Morus
Morus nigra
Musa acuminata
Musa x paradisiaca
Myrica
Myristica fragrans
Nelumbo
Nelumbo nucifera
Nephelium lappaceum
Numida meleagris
Nuphar lutea
Ocimum basilicum
Odocoileus
Oenothera biennis
Olea europaea
Opuntia
Opuntia cochenillifera
Opuntia macrorhiza
Origanum majorana
Origanum onites
Origanum vulgare
Origanum X majoricum
Oryctolagus
Oryza rufipogon
Oryza sativa
Ovis aries
Pachyrhizus erosus
Panax ginseng
Pangium edule
Panicum miliaceum
Passiflora edulis
Pastinaca sativa
Paullinia cupanaKNApSAcK Database
Paullinia trifoliataKNApSAcK Database
Pediomelum esculentum
Perideridia oregana
Persea americana
Petasites japonicus
Petroselinum crispum
Phaseolus coccineus
Phaseolus lunatus
Phaseolus vulgaris
Phasianidae
Phasianus colchicus
Phoenix dactylifera
Photinia melanocarpa
Phyllostachys edulis
Physalis
Physalis philadelphica var. immaculata
Phytolacca americana
Pimenta dioica
Pimpinella anisum
Pinus
Pinus edulis
Piper nigrum L.
Pistacia vera
Pisum sativum
Pleurotus ostreatus
Polygonum alpinum
Portulaca oleracea
Pouteria sapota
Prunus armeniaca
Prunus avium
Prunus avium L.
Prunus cerasus
Prunus domestica
Prunus dulcis
Prunus persica
Prunus persica var. nucipersica
Prunus persica var. persica
Prunus tomentosa
Prunus virginiana
Psidium cattleianum
Psidium guajava
Psophocarpus tetragonolobus
Punica granatum
Pyrus communis
Pyrus pyrifolia
Quercus
Raphanus sativus
Raphanus sativus var. longipinnatus
Raphanus sativus var. sativus
Rheum rhabarbarum
Ribes aureum
Ribes glandulosum
Ribes nigrum
Ribes rubrum
Ribes uva-crispa
Rosa
Rubus arcticus
Rubus chamaemorus
Rubus idaeus
Rubus occidentalis
Rubus spectabilis
Rumex
Rumex acetosa
Rumex articus
Sagittaria latifolia
Salix pulchra
Salvia elegans
Salvia hispanica
Salvia officinalis
Salvia rosmarinus
Sambucus nigra
Sambucus nigra L.
Satureja hortensis L.
Satureja montana
Scorzonera hispanica
Secale cereale
Sechium edule
Sesamum indicum
Sesbania bispinosa
Sinapis alba
Sisymbrium
Solanum lycopersicum
Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. lycopersicum
Solanum melongena
Solanum quitoense
Solanum tuberosum
Sorbus aucuparia
Sorghum bicolor
Spinacia oleracea
Struthio camelus
Sus scrofa
Sus scrofa domestica
Syzygium aromaticum
Syzygium cumini
Syzygium jambos
Tamarindus indica
Taraxacum officinale
Tetragonia tetragonioides
Thelesperma
Theobroma cacaoKNApSAcK Database
Theobroma grandiflorumKNApSAcK Database
Thymus pulegioides
Thymus vulgaris
Tilia cordata
Tilia L.
Tragopogon porrifolius
Trigonella foenum-graecum
Triticum
Triticum aestivum
Triticum durum
Triticum spelta
Triticum turanicum
Typha angustifolia
Vaccinium
Vaccinium angustifolium
Vaccinium angustifolium X Vaccinium corymbosum
Vaccinium arboreum
Vaccinium corymbosum
Vaccinium deliciosum
Vaccinium elliottii
Vaccinium macrocarpon
Vaccinium myrtilloides
Vaccinium myrtillus
Vaccinium ovalifolium
Vaccinium ovatum
Vaccinium oxycoccos
Vaccinium parvifolium
Vaccinium reticulatum
Vaccinium stamineum
Vaccinium uliginosum
Vaccinium vitis-idaea
Valerianella locusta
Vanilla
Verbena officinalis
Viburnum edule
Vicia faba
Vigna aconitifolia
Vigna angularis
Vigna mungo
Vigna radiata
Vigna umbellata
Vigna unguiculata
Vigna unguiculata ssp. cylindrica
Vigna unguiculata ssp. unguiculata
Vigna unguiculata var. sesquipedalis
Vitis
Vitis aestivalis
Vitis labrusca
Vitis rotundifolia
Vitis vinifera L.
Xanthosoma sagittifolium
Zea mays L.
Zingiber officinale
Zizania
Zizania aquatica
Ziziphus zizyphus
Chemical Taxonomy
Description Belongs to the class of organic compounds known as xanthines. These are purine derivatives with a ketone group conjugated at carbons 2 and 6 of the purine moiety.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassImidazopyrimidines
Sub ClassPurines and purine derivatives
Direct ParentXanthines
Alternative Parents
Substituents
  • Xanthine
  • 6-oxopurine
  • Purinone
  • Alkaloid or derivatives
  • Pyrimidone
  • Hydroxypyrimidine
  • N-substituted imidazole
  • Pyrimidine
  • Imidazole
  • Azole
  • Heteroaromatic compound
  • Lactam
  • Azacycle
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic nitrogen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point351 - 352 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
Water Solubility9.13 g/LALOGPS
logP-0.63ALOGPS
logP0.24ChemAxon
logS-1.3ALOGPS
pKa (Strongest Acidic)10.76ChemAxon
pKa (Strongest Basic)-0.87ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area67.23 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity46.72 m³·mol⁻¹ChemAxon
Polarizability16.87 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDHMDB0001860
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB022714
KNApSAcK IDC00039930
Chemspider ID4525
KEGG Compound IDC13747
BioCyc ID1-7-DIMETHYLXANTHINE
BiGG IDNot Available
Wikipedia LinkParaxanthine
METLIN ID1457
PubChem Compound4687
PDB IDNot Available
ChEBI ID25858
Good Scents IDNot Available
References
General References
  1. Sreekumar A, Poisson LM, Rajendiran TM, Khan AP, Cao Q, Yu J, Laxman B, Mehra R, Lonigro RJ, Li Y, Nyati MK, Ahsan A, Kalyana-Sundaram S, Han B, Cao X, Byun J, Omenn GS, Ghosh D, Pennathur S, Alexander DC, Berger A, Shuster JR, Wei JT, Varambally S, Beecher C, Chinnaiyan AM: Metabolomic profiles delineate potential role for sarcosine in prostate cancer progression. Nature. 2009 Feb 12;457(7231):910-4. doi: 10.1038/nature07762. [PubMed:19212411 ]
  2. Christensen M, Andersson K, Dalen P, Mirghani RA, Muirhead GJ, Nordmark A, Tybring G, Wahlberg A, Yasar U, Bertilsson L: The Karolinska cocktail for phenotyping of five human cytochrome P450 enzymes. Clin Pharmacol Ther. 2003 Jun;73(6):517-28. [PubMed:12811361 ]
  3. Fuhr U, Rost KL: Simple and reliable CYP1A2 phenotyping by the paraxanthine/caffeine ratio in plasma and in saliva. Pharmacogenetics. 1994 Jun;4(3):109-16. [PubMed:7920690 ]
  4. Tanaka E: Simultaneous determination of caffeine and its primary demethylated metabolites in human plasma by high-performance liquid chromatography. J Chromatogr. 1992 Mar 27;575(2):311-4. [PubMed:1629311 ]
  5. Horrigan LA, Kelly JP, Connor TJ: Immunomodulatory effects of caffeine: friend or foe? Pharmacol Ther. 2006 Sep;111(3):877-92. Epub 2006 Mar 15. [PubMed:16540173 ]
  6. Holstege A, Kurz M, Weinbeck M, Gerok W: Excretion of caffeine and its primary degradation products into bile. J Hepatol. 1993 Jan;17(1):67-73. [PubMed:8445222 ]
  7. Granfors MT, Backman JT, Laitila J, Neuvonen PJ: Oral contraceptives containing ethinyl estradiol and gestodene markedly increase plasma concentrations and effects of tizanidine by inhibiting cytochrome P450 1A2. Clin Pharmacol Ther. 2005 Oct;78(4):400-11. [PubMed:16198659 ]
  8. Blanchard J, Weber CW, Shearer LE: HPLC analysis of methylxanthines in human breast milk. J Chromatogr Sci. 1990 Dec;28(12):640-2. [PubMed:2292610 ]
  9. Delahunty T, Schoendorfer D: Caffeine demethylation monitoring using a transdermal sweat patch. J Anal Toxicol. 1998 Nov-Dec;22(7):596-600. [PubMed:9847011 ]
  10. Holland DT, Godfredsen KA, Page T, Connor JD: Simple high-performance liquid chromatography method for the simultaneous determination of serum caffeine and paraxanthine following rapid sample preparation. J Chromatogr B Biomed Sci Appl. 1998 Apr 10;707(1-2):105-10. [PubMed:9613939 ]
  11. Fuhr U, Rost KL, Engelhardt R, Sachs M, Liermann D, Belloc C, Beaune P, Janezic S, Grant D, Meyer UA, Staib AH: Evaluation of caffeine as a test drug for CYP1A2, NAT2 and CYP2E1 phenotyping in man by in vivo versus in vitro correlations. Pharmacogenetics. 1996 Apr;6(2):159-76. [PubMed:9156694 ]
  12. Zaigler M, Rietbrock S, Szymanski J, Dericks-Tan JS, Staib AH, Fuhr U: Variation of CYP1A2-dependent caffeine metabolism during menstrual cycle in healthy women. Int J Clin Pharmacol Ther. 2000 May;38(5):235-44. [PubMed:10839467 ]
  13. Blanchard J, Weber CW, Shearer LE: Methylxanthine levels in breast milk of lactating women of different ethnic and socioeconomic classes. Biopharm Drug Dispos. 1992 Apr;13(3):187-96. [PubMed:1576327 ]
  14. Wahllander A, Renner E, Karlaganis G: High-performance liquid chromatographic determination of dimethylxanthine metabolites of caffeine in human plasma. J Chromatogr. 1985 Mar 22;338(2):369-75. [PubMed:3998024 ]
  15. Koch JP, ten Tusscher GW, Koppe JG, Guchelaar HJ: Validation of a high-performance liquid chromatography assay for quantification of caffeine and paraxanthine in human serum in the context of CYP1A2 phenotyping. Biomed Chromatogr. 1999 Jun;13(4):309-14. [PubMed:10416066 ]
  16. Sachse C, Ruschen S, Dettling M, Schley J, Bauer S, Muller-Oerlinghausen B, Roots I, Brockmoller J: Flavin monooxygenase 3 (FMO3) polymorphism in a white population: allele frequencies, mutation linkage, and functional effects on clozapine and caffeine metabolism. Clin Pharmacol Ther. 1999 Oct;66(4):431-8. [PubMed:10546928 ]