<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Rath G</dc:creator>
  <dc:creator>Potterat O</dc:creator>
  <dc:creator>Mavi S</dc:creator>
  <dc:creator>Hostettmann K</dc:creator>
  <dc:date>1996</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">Four new xanthones have been isolated from the roots of Hypericum roeperanum. Their structures have been established by a combination of spectroscopic and chemical methods as 1,6-dihydroxy-5-methoxy-4',5'-dihydro-4',4',5'-trimethylfurano- (2',3':3,4)-xanthone (5-O-methyl-2-deprenylrheediaxanthone B), 1,6-dihydroxy-5-methoxy-6',6'-dimethylpyrano-(2',3':3,4)-xanthone (5-O-methylisojacareubin), 1,3,5,6-tetrahydroxy-2-(2',2'-dimethyl-4'-isopropenyl)-cyclopen tanylxanthone (5-O-demethylpaxanthonin) and 1,3,5,6-tetrahydroxy-4-trans-sesquilavandulylxanthone (roeperanone). In addition, 2-hydroxyxanthone, 5-hydroxy-2-methoxyxanthone, 1,5-dihydroxy-2-methoxyxanthone, 2-deprenyl rheediaxanthone B, isojacareubin and calycinoxanthone D have been isolated and characterized. Some of the isolated xanthones exhibited antifungal activity against Candida albicans.</dc:description>
  <dc:identifier>https://sonar.ch/global/documents/2099</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/0031-9422(96)00284-1</dc:relation>
  <dc:relation>info:eu-repo/semantics/altIdentifier/pmid/8862040</dc:relation>
  <dc:source>Phytochemistry. - 1996</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">Antifungal Agents</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">Candida albicans</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">Magnetic Resonance Spectroscopy</dc:subject>
  <dc:subject xmlns:ns4="xml" ns4:lang="en">Microbial Sensitivity Tests</dc:subject>
  <dc:subject xmlns:ns5="xml" ns5:lang="en">Molecular Structure</dc:subject>
  <dc:subject xmlns:ns6="xml" ns6:lang="en">Optical Rotation</dc:subject>
  <dc:subject xmlns:ns7="xml" ns7:lang="en">Structure-Activity Relationship</dc:subject>
  <dc:subject xmlns:ns8="xml" ns8:lang="en">Xanthenes</dc:subject>
  <dc:subject xmlns:ns9="xml" ns9:lang="en">Xanthones</dc:subject>
  <dc:title xmlns:ns10="xml" ns10:lang="en">Xanthones from Hypericum roeperanum.</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>