@article{hess_farah_eguchib_imamura_2000,  title={Synthetic studies with Pinus elliottiis rosin derivatives. Oxidation of maleopimaric anhydride methyl ester and trimethyl fumaropimarate},  volume={11},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532000000100011},  DOI={10.1590/S0103-50532000000100011},  number={1},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Hess, Sonia C. and Farah, Maria I. S. and Eguchib, Silvia Y. and Imamura, Paulo M.},  year={2000},  month={Jan},  pages={59–63} }