Record Information
Creation date2010-04-08 22:05:13 UTC
Update date2020-09-17 15:40:43 UTC
Primary IDFDB002066
Secondary Accession NumbersNot Available
Chemical Information
FooDB NameGlucobrassicin
DescriptionGlucobrassicin belongs to the class of organic compounds known as alkylglucosinolates. These are organic compounds containing a glucosinolate moiety that carries an alkyl chain. Glucobrassicin is an extremely weak basic (essentially neutral) compound (based on its pKa). Glucobrassicin is a bitter tasting compound. Outside of the human body, Glucobrassicin has been detected, but not quantified in, several different foods, such as cauliflowers, broccoli, horseradish, chinese mustards, and swedes. This could make glucobrassicin a potential biomarker for the consumption of these foods. A single glucosylation occurs attaching a glucose molecule to the indole hydroximate through a thioether linkage. Several derivatives of glucobrassicin are known. The biosynthesis of glucobrassicin begins with tryptophan produced through several steps from the Shikimic acid pathway compound, chorismic acid. The compound itself was first isolated from Brassica plants, hence the ending of the name. As for other glucosinolates, degradation by the enzyme myrosinase is expected to produce an isothiocyanate, indol-3-ylmethylisothiocyanate. However, a large number of other reaction products are known, and indole-3-carbinol is not the dominant degradation product when glucosinolate degradation takes place in crushed plant tissue or in intact plants. Currently, the following six derivatives are known from plants:1-Methoxyglucobrassicin (neoglucobrassicin)4-Hydroxyglucobrassicin4-Methoxyglucobrassicin1,4-Dimethoxyglucobrassicin1-Sulfoglucobrassicin6'-IsoferuloylglucobrassicinThe three first mentioned derivatives are as frequent in crucifers as glucobrassicin itself. Tryptophan is converted to indole-3-acetaldoxime (IAOx) by cytochrome p450 enzymes (the redundant CYP92B3 and CYP79B3 in Arabidopsis thaliana) using NADPH and molecular Oxygen.
CAS Number4356-52-9
indol-3-Ylmethyl glucosinolateMeSH
Predicted Properties
Water Solubility1.81 g/LALOGPS
pKa (Strongest Acidic)-3.4ChemAxon
pKa (Strongest Basic)-0.29ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count9ChemAxon
Hydrogen Donor Count6ChemAxon
Polar Surface Area181.9 ŲChemAxon
Rotatable Bond Count7ChemAxon
Refractivity101.23 m³·mol⁻¹ChemAxon
Polarizability42.44 ųChemAxon
Number of Rings3ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Chemical FormulaC16H20N2O9S2
IUPAC name{[(E)-[2-(1H-indol-3-yl)-1-{[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]sulfanyl}ethylidene]amino]oxy}sulfonic acid
InChI IdentifierInChI=1S/C16H20N2O9S2/c19-7-11-13(20)14(21)15(22)16(26-11)28-12(18-27-29(23,24)25)5-8-6-17-10-4-2-1-3-9(8)10/h1-4,6,11,13-17,19-22H,5,7H2,(H,23,24,25)/b18-12+
Average Molecular Weight448.468
Monoisotopic Molecular Weight448.061021628
Description belongs to the class of organic compounds known as alkylglucosinolates. These are organic compounds containing a glucosinolate moiety that carries an alkyl chain.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassCarbohydrates and carbohydrate conjugates
Direct ParentAlkylglucosinolates
Alternative Parents
  • Alkylglucosinolate
  • Glycosyl compound
  • S-glycosyl compound
  • 3-alkylindole
  • Indole
  • Indole or derivatives
  • Oxane
  • Benzenoid
  • Substituted pyrrole
  • Monothioacetal
  • Heteroaromatic compound
  • Organic sulfuric acid or derivatives
  • Pyrrole
  • Secondary alcohol
  • Oxacycle
  • Azacycle
  • Polyol
  • Organoheterocyclic compound
  • Sulfenyl compound
  • Organosulfur compound
  • Organonitrogen compound
  • Alcohol
  • Hydrocarbon derivative
  • Organic nitrogen compound
  • Primary alcohol
  • Organopnictogen compound
  • Organic oxide
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available

Route of exposure:


Biological location:

Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionC 42.85%; H 4.49%; N 6.25%; O 32.11%; S 14.30%DFC
Melting PointMp 149-150° (as Me4N salt)DFC
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logPNot Available
Experimental pKaNot Available
Isoelectric pointNot Available
ChargeNot Available
Optical Rotation[a]22D -13.3 (Me4N salt)DFC
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0089-9803400000-5780fef230bb0579eb03JSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (3 TMS) - 70eV, Positivesplash10-0udj-3962038000-866ed4459356cdab81b4JSpectraViewer
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-b65c20894fd7bebf4975JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-a638b0c9711619390857JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-18a45c4a14ab1623b4c9JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-2c6defe07f0424391ff8JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-8f9b73131d7ad5e9ffc9JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9010100000-9e24bf87eacf9fab447dJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-42bec04e55256f3d644eJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9000000000-23f70d1ab75b41bb1737JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-0000900000-0729cb0d0eabee7ac62aJSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-0000900000-9ba5439d42050658ce10JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-8000900000-72813133542f3f30c006JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-2000900000-b077c107ece5047e8384JSpectraViewer | MoNA
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-ITFT , negativesplash10-0002-9010300000-417cc0a1a594a6ea4504JSpectraViewer | MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-000t-0940700000-667fecebc846ae563dcaJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-029l-0937000000-fe84e444e901db4dae48JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-001i-5900000000-ae8118bdec9079ffc50dJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-3290000000-c1f3a1fda8a4d72ade78JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0uk9-7970000000-a03ba08d3973bef3163fJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0w9u-6940000000-e8f4aea93ac317ebf659JSpectraViewer
ChemSpider ID7875815
ChEMBL IDNot Available
KEGG Compound IDNot Available
Pubchem Compound ID9601691
Pubchem Substance IDNot Available
ChEBI IDNot Available
Phenol-Explorer IDNot Available
DrugBank IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDCDQ62-K:CDQ62-K
EAFUS IDNot Available
BIGG IDNot Available
KNApSAcK IDC00000125
HET IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia IDNot Available
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
Biological Effects and Interactions
Health Effects / Bioactivities
quinone-reductase inducerDUKE
EnzymesNot Available
PathwaysNot Available
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
  1. Ayana Wiener, Marina Shudler, Anat Levit, Masha Y. Niv. BitterDB: a database of bitter compounds. Nucleic Acids Res 2012, 40(Database issue):D413-419. DOI:10.1093/nar/gkr755
MSDSNot Available
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference— Shinbo, Y., et al. 'KNApSAcK: a comprehensive species-metabolite relationship database.' Plant Metabolomics. Springer Berlin Heidelberg, 2006. 165-181.
— Duke, James. 'Dr. Duke's Phytochemical and Ethnobotanical Databases. United States Department of Agriculture.' Agricultural Research Service, Accessed April 27 (2004).