Abstract
A synthesis of a new analogue of homosesquiterpene oidiolactone is described, starting from abietic acid.
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Acknowledgments
We are grateful to FAPESP for financial support and to Harima do Paraná Indústria Química Ltd. and Especialidades Químicas Paraná S.A. for providing Pinus elliottii's resin. C. S. acknowledges CNPq for a fellowship. We also thank C. H. Collins for reading this paper and L. H. B. Baptistella for helpful discussions.