<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2010-04-08 22:10:37 UTC</creation_date>
  <update_date>2025-11-18 23:43:01 UTC</update_date>
  <accession>FDB013274</accession>
  <name>Thymoquinone</name>
  <description>Major constituent of seed oil of black cumin, Nigella sativa (24%). Thymoquinone is found in herbs and spices and winter savory.</description>
  <synonyms>
    <synonym>2-Isopropyl-5-methyl-1,4-benzoquinone</synonym>
    <synonym>2-Isopropyl-5-methyl-p-benzoquinone</synonym>
    <synonym>2-Isopropyl-5-methylbenzo-1,4-quinone</synonym>
    <synonym>2-Isopropyl-5-methylbenzoquinone</synonym>
    <synonym>2-Methyl-5-(1-methylethyl)-2,5-cyclohexadiene-1,4-dione</synonym>
    <synonym>2-Methyl-5-(1-methylethyl)-2,5-cyclohexadiene-1,4-dione, 9CI</synonym>
    <synonym>2-Methyl-5-isopropyl-1,4-benzoquinone</synonym>
    <synonym>2-Methyl-5-isopropyl-p-benzoquinone</synonym>
    <synonym>2,5-Cyclohexadiene-1,4-dione, 2-methyl-5-(1-methylethyl)-</synonym>
    <synonym>2,5-Cyclohexadiene-1,4-dione, 5-isopropyl-2-methyl-</synonym>
    <synonym>5-Isopropyl-2-methyl-1,4-benzoquinone</synonym>
    <synonym>5-Isopropyl-2-methyl-2,5-cyclohexadiene-1,4-dione</synonym>
    <synonym>5-Isopropyl-2-methyl-p-benzoquinone</synonym>
    <synonym>p-Cymene-2,5-dione</synonym>
    <synonym>p-Mentha-3,6-diene-2,5-dione (8CI)</synonym>
    <synonym>Polythymoquinone</synonym>
    <synonym>Thymoil</synonym>
    <synonym>Thymolquinone</synonym>
    <synonym>Thymoquinon</synonym>
    <synonym>Thymoquinone</synonym>
  </synonyms>
  <chemical_formula>C10H12O2</chemical_formula>
  <average_molecular_weight>164.2011</average_molecular_weight>
  <monisotopic_moleculate_weight>164.083729628</monisotopic_moleculate_weight>
  <iupac_name>2-methyl-5-(propan-2-yl)cyclohexa-2,5-diene-1,4-dione</iupac_name>
  <traditional_iupac>thymoquinone</traditional_iupac>
  <cas_registry_number>490-91-5</cas_registry_number>
  <smiles>CC(C)C1=CC(=O)C(C)=CC1=O</smiles>
  <inchi>InChI=1S/C10H12O2/c1-6(2)8-5-9(11)7(3)4-10(8)12/h4-6H,1-3H3</inchi>
  <inchikey>KEQHJBNSCLWCAE-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of organic compounds known as p-benzoquinones. These are benzoquinones where the two C=O groups are attached at the 1- and 4-positions, respectively.</description>
    <direct_parent>P-benzoquinones</direct_parent>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organic oxygen compounds</super_class>
    <class>Organooxygen compounds</class>
    <sub_class>Carbonyl compounds</sub_class>
    <molecular_framework>Aliphatic homomonocyclic compounds</molecular_framework>
    <alternative_parents>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>Aliphatic homomonocyclic compound</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>P-benzoquinone</substituent>
    </substituents>
    <external_descriptors>
    </external_descriptors>
  </taxonomy>
  <state/>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>2.00</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.95</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>1.83e+00 g/l</value>
      <source>ALOGPS</source>
    </property>
  </predicted_properties>
  <experimental_properties>
    <property>
      <kind>melting_point</kind>
      <value>Mp 44-45°</value>
    </property>
  </experimental_properties>
  <property>
    <kind>logp</kind>
    <value>2.55</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_basic</kind>
    <value>-7.7</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>iupac</kind>
    <value>2-methyl-5-(propan-2-yl)cyclohexa-2,5-diene-1,4-dione</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>average_mass</kind>
    <value>164.2011</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>mono_mass</kind>
    <value>164.083729628</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>smiles</kind>
    <value>CC(C)C1=CC(=O)C(C)=CC1=O</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formula</kind>
    <value>C10H12O2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchi</kind>
    <value>InChI=1S/C10H12O2/c1-6(2)8-5-9(11)7(3)4-10(8)12/h4-6H,1-3H3</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchikey</kind>
    <value>KEQHJBNSCLWCAE-UHFFFAOYSA-N</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polar_surface_area</kind>
    <value>34.14</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>refractivity</kind>
    <value>48.89</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polarizability</kind>
    <value>17.84</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>rotatable_bond_count</kind>
    <value>1</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>acceptor_count</kind>
    <value>2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>donor_count</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>physiological_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formal_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <pathways>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>97896</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>97897</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>97898</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>162699</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>162700</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>162701</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2815837</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2815838</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2815839</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2893712</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2893713</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2893714</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>15790</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>131124</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>138858</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsIr</type>
      <spectrum_id>6668</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsIr</type>
      <spectrum_id>6669</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127418</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127419</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127420</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127421</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127422</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127423</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127424</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127425</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127426</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127427</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127428</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127429</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127430</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127431</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127432</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127433</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127434</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127435</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127436</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>127437</spectrum_id>
    </spectrum>
  </spectra>
  <hmdb_id>HMDB34732</hmdb_id>
  <pubchem_compound_id/>
  <chemspider_id/>
  <kegg_id/>
  <chebi_id/>
  <biocyc_id/>
  <het_id>IMW</het_id>
  <wikipidia/>
  <vmh_id/>
  <fbonto_id/>
  <foodb_id/>
  <general_references>
    <reference>#&lt;Reference:0x000055ce335974a8&gt;</reference>
    <reference>#&lt;Reference:0x000055ce33597228&gt;</reference>
    <reference>#&lt;Reference:0x000055ce33597070&gt;</reference>
    <reference>#&lt;Reference:0x000055ce33596e68&gt;</reference>
    <reference>#&lt;Reference:0x000055ce33596c38&gt;</reference>
  </general_references>
  <foods>
    <food>
      <name>Herbs and Spices</name>
      <food_type>Unknown</food_type>
      <category>generic</category>
      <name_scientific/>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Winter savory</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Satureja montana</name_scientific>
      <ncbi_taxonomy_id>49988</ncbi_taxonomy_id>
      <average_value>3.8</average_value>
      <max_value>3.8</max_value>
      <min_value>3.8</min_value>
      <unit>mg/100 g</unit>
    </food>
  </foods>
  <flavors>
  </flavors>
  <enzymes>
  </enzymes>
  <health_effects>
    <health_effect>
      <name>Anti bacterial</name>
      <id>145</id>
      <definition>A substance that kills or slows the growth of bacteria.</definition>
    </health_effect>
    <health_effect>
      <name>Anti eicosanoid</name>
      <id>249</id>
      <definition>A substance that diminishes the rate of a chemical reaction.</definition>
    </health_effect>
    <health_effect>
      <name>Anti histaminic</name>
      <id>331</id>
      <definition>Histamine antagonists are the drugs that bind to but do not activate histamine receptors, thereby blocking the actions of histamine or histamine agonists.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-arthritic</name>
      <id>131</id>
      <definition>Any substance introduced into a living organism with therapeutic or diagnostic purpose.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-asthmatic</name>
      <id>134</id>
      <definition>A drug used to treat asthma.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-bronchitic</name>
      <id>154</id>
      <definition>Any substance introduced into a living organism with therapeutic or diagnostic purpose.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-oxidant</name>
      <id>502</id>
      <definition>A substance that opposes oxidation or inhibits reactions brought about by dioxygen or peroxides. In European countries, E-numbers for permitted antioxidant food additives are from E 300 to E 324.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-rheumatic</name>
      <id>585</id>
      <definition>Any substance introduced into a living organism with therapeutic or diagnostic purpose.</definition>
    </health_effect>
    <health_effect>
      <name>Anti-spasmodic</name>
      <id>619</id>
      <definition>Any substance introduced into a living organism with therapeutic or diagnostic purpose.</definition>
    </health_effect>
    <health_effect>
      <name>Carcinogenic</name>
      <id>762</id>
      <definition>A role played by a chemical compound which is known to  induce a process of carcinogenesis  by corrupting  normal cellular pathways, leading to the acquistion of tumoral capabilities.</definition>
    </health_effect>
    <health_effect>
      <name>Choleretic</name>
      <id>801</id>
      <definition/>
    </health_effect>
    <health_effect>
      <name>Cyclooxygenase inhibitor</name>
      <id>849</id>
      <definition>A compound or agent that combines with cyclooxygenases (EC 1.14.99.1) and thereby prevents its substrate-enzyme combination with arachidonic acid and the formation of icosanoids, prostaglandins, and thromboxanes.</definition>
    </health_effect>
    <health_effect>
      <name>Lipoxygenase inhibitor</name>
      <id>1077</id>
      <definition>A compound or agent that combines with lipoxygenase and thereby prevents its substrate-enzyme combination with arachidonic acid and the formation of the icosanoid products hydroxyicosatetraenoic acid and various leukotrienes.</definition>
    </health_effect>
    <health_effect>
      <name>Pesticide</name>
      <id>1210</id>
      <definition>Strictly, a substance intended to kill pests. In common usage, any substance used for controlling, preventing, or destroying animal, microbiological or plant pests.</definition>
    </health_effect>
    <health_effect>
      <name>Toxic</name>
      <id>1371</id>
      <definition>A role played by the molecular entity or part thereof which causes the development of a pathological process.</definition>
    </health_effect>
    <health_effect>
      <name>Uricosuric</name>
      <id>1396</id>
      <definition/>
    </health_effect>
  </health_effects>
</compound>
