<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2016-05-22 03:41:03 UTC</creation_date>
  <update_date>2026-08-24 16:02:11 UTC</update_date>
  <accession/>
  <common_name>Famotidine</common_name>
  <class>SmallMolecule</class>
  <description>Famotidine is an organic compound with the formula C8H15N7O2S3 and an average molecular weight of 337.44 g/mol. Famotidine belongs to the thiazoles, a subclass of azoles within the organic compounds. In terms of biological activity, it acts as an antagonist of the Histamine H2 receptor (HRH2).

The compound is found in or released from four recorded sources, including drinking water and water supply, electrical and electronic equipment such as antennas and amplifiers, and healthcare, pharmaceuticals and veterinary products, specifically drugs for acid related disorders. Recorded exposure routes for this substance include oral and intravenous administration.</description>
  <categories/>
  <types>
    <type>Human Neurotoxin</type>
  </types>
  <synonyms>
    <synonym>3-[({2-[(diaminomethylidene)amino]-1,3-thiazol-4-yl}methyl)sulfanyl]-N'-sulfamoylpropanimidamide</synonym>
    <synonym>famotidin</synonym>
  </synonyms>
  <chemical_formula>C8H15N7O2S3</chemical_formula>
  <average_molecular_weight>337.445</average_molecular_weight>
  <monisotopic_moleculate_weight>337.044934829</monisotopic_moleculate_weight>
  <iupac_name>3-[({2-[(diaminomethylidene)amino]-1,3-thiazol-4-yl}methyl)sulfanyl]-N'-sulfamoylpropanimidamide</iupac_name>
  <traditional_iupac>famotidine</traditional_iupac>
  <cas_registry_number>76824-35-6</cas_registry_number>
  <smiles>NC(N)=NC1=NC(CSCCC(N)=NS(N)(=O)=O)=CS1</smiles>
  <inchi>InChI=1S/C8H15N7O2S3/c9-6(15-20(12,16)17)1-2-18-3-5-4-19-8(13-5)14-7(10)11/h4H,1-3H2,(H2,9,15)(H2,12,16,17)(H4,10,11,13,14)</inchi>
  <inchikey>XUFQPHANEAPEMJ-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom/>
    <super_class/>
    <class/>
    <sub_class/>
    <direct_parent/>
    <alternate_parents/>
    <substituents/>
    <molecular_framework/>
    <descriptors/>
  </taxonomy>
  <status>Detected and Not Quantified</status>
  <origin/>
  <cellular_locations/>
  <biofluid_locations/>
  <tissue_locations/>
  <pathways>
    <pathway>
      <name>Famotidine Action Pathway</name>
      <smpdb_id>SMP0000231</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Famotidine H2 Anti-Histamine Action Pathway</name>
      <smpdb_id>SMP0126789</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Famotidine Drug Metabolism Action Pathway</name>
      <smpdb_id>SMP0143359</smpdb_id>
      <kegg_map_id/>
    </pathway>
  </pathways>
  <state/>
  <appearance/>
  <experimental_properties>
    <property>
      <kind>logp</kind>
      <value>-2</value>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-0.20</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-3.10</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>2.71e-01 g/l</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>-2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>9.29</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>8.38</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>3-[({2-[(diaminomethylidene)amino]-1,3-thiazol-4-yl}methyl)sulfanyl]-N'-sulfamoylpropanimidamide</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>337.445</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>337.044934829</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>NC(N)=NC1=NC(CSCCC(N)=NS(N)(=O)=O)=CS1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C8H15N7O2S3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C8H15N7O2S3/c9-6(15-20(12,16)17)1-2-18-3-5-4-19-8(13-5)14-7(10)11/h4H,1-3H2,(H2,9,15)(H2,12,16,17)(H4,10,11,13,14)</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>XUFQPHANEAPEMJ-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>175.83</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>80.46</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>32.03</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>6</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>8</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
  <route_of_exposure/>
  <mechanism_of_toxicity/>
  <metabolism/>
  <toxicity/>
  <lethaldose/>
  <carcinogenicity/>
  <use_source/>
  <min_risk_level/>
  <health_effects>#&lt;HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f3bf3ec3700&gt;</health_effects>
  <symptoms/>
  <treatment/>
  <drugbank_id>DB00927</drugbank_id>
  <hmdb_id/>
  <pubchem_compound_id>5702160</pubchem_compound_id>
  <chembl_id/>
  <chemspider_id>3208</chemspider_id>
  <kegg_id/>
  <uniprot_id/>
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  <chebi_id/>
  <biocyc_id/>
  <ctd_id/>
  <stitch_id/>
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  <pdb_id/>
  <wikipidia/>
  <general_references/>
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      <target_id>BE0000112</target_id>
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  </targets>
</compound>
