28 SEVERAL SESQUITERPENOIDS ISOLATED FROM ACORUS CALAMUS L.

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  • Yamamura S.
    Faculty of Pharmacy, Meijo University
  • Iguchi M.
    Faculty of Pharmacy, Meijo University
  • Nishiyama A.
    Faculty of Pharmacy, Meijo University
  • Niwa M.
    Faculty of Pharmacy, Meijo University
  • Kato K.
    Chemical Institute, Faculty of Science, Nagoya University
  • Koyama H.
    Chemical Institute, Faculty of Science, Nagoya University
  • Hirata Y.
    Chemical Institute, Faculty of Science, Nagoya University

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  • 28 ショウブのセスキテルペン

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We here describe the structures of four monocyclic sesquiterpenes [Shyobunone (I), Epishyobunine (II), Isoshyobunone (III) and Preisocalamendiol (XII)] as well as two cadinane-type compounds [Calameone (XX) and Isocalamendiol (XXI)], all of which have been isolated from Acorus calamus L. Especially, shyobunone (I), which has been synthesized from 1-santonin, has been converted into other sesquiterpenes [(II), (III), (XII), (XX) and (XXI)]. Finally, the biogenesis of these sesquiterpenes and some biogenetic model reactions have been discussed.

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