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imperatorin
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Imperatorin is a furocoumarin and a phytochemical that has been isolated from ''Urena lobata'' L. (Malvaceae), ''Angelica archangelica'', ''Angelica dahurica'', ''Glehnia littoralis'', ''Saposhnikovia divaricata'', ''Cnidium monnieri'', ''Incarvillea younghusbandii'', and ''Zanthoxylum americanum mill''. It is biosynthesized from umbelliferone, a coumarin derivative.〔F. M. Dean ''Naturally Occurring Oxygen Ring Compounds'', Butterworths, London, 1963.〕
== Isolation ==
The procedure for the isolation of imperatorin from ''Urena lobata'' involves exhaustively extracting under reflux with benzene the air-dried and pulverised roots followed by separation by column chromatography.〔A furocoumarin, Imperatorin isolated from Urena lobata L. (Malvaceae) Keshab Ghosh Molbank 2004, M382 () open access publication〕
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