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Structures and allelopathic effects ofNuphar alkaloids: Nupharolutine and 6,6′-dihydroxythiobinupharidine

Abstract

Two of the majorNuphar alkaloids, nupharolutine and 6,6′-dihydroxythiobinupharidine, were isolated from the aquatic perennial herbNuphar lutea (L.) Sibth. & Sm., yellow water lily. In a lettuce seedling bioassay of the two pure compounds, the former was inactive and the latter was highly inhibitory of radicle elongation at concentrations greater than 2 ppm. Structures and stereochemistry of the two compounds were confirmed by DEPT,1H-1H COSY,1H-13C COSY, and1H-1H NOESY experiments.

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Elakovich, S.D., Yang, J. Structures and allelopathic effects ofNuphar alkaloids: Nupharolutine and 6,6′-dihydroxythiobinupharidine. J Chem Ecol 22, 2209–2219 (1996). https://doi.org/10.1007/BF02029541

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  • DOI: https://doi.org/10.1007/BF02029541

Key Words

  • Allelopathy
  • aquatic plant
  • bioassay
  • Nuphar lutea
  • alkaloids
  • NMR
  • nupharolutine
  • 6,6′-dihydroxythiobinupharidine
  • Nymphaeaceae