Leaf-cutting ants toxicity of limonexic acid and degraded limonoids from Raulinoa echinata.: X-ray structure of epoxy-fraxinellone

Phytochemical survey of roots extracts of the South Brazilian endemic plant Raulinoa echinata Cowan, Rutaceae led to the isolation of known degraded limonoids: fraxinellone, fraxinellonone and epoxy-fraxinellone. The latter was previously isolated also from the stems, but the relative configuration could not be solved by NMR experiments. This paper deals with the X-ray diffraction analysis of epoxy-fraxinellone and its toxicity to leaf-cutting ants, describes the isolation of fraxinellonone and fraxinellone for the first time in Raulinoa. Epoxy-fraxinellone showed no toxicity to the leaf-cutting ants (Atta sexdens rubropilosa). The limonoid limonexic acid, isolated from stems, presented high toxicity to the leaf-cutting ants, diminishing considerably their longevity.

Bibliographic Details

Main Authors:	Biavatti,Maique W., Westerlon,Rosângela, Vieira,Paulo C., Silva,M. Fátima G. F. da, Fernandes,João B., Peñaflor,M. Fernanda G. V., Bueno,Odair C., Ellena,Javier
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 2005
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000800025
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