@article{nogueira_giacomini_shepherd_imamura_2002,  title={A New ent-Clerodane Diterpene from Hymenaea courbaril var. altissima},  volume={13},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532002000300015},  DOI={10.1590/S0103-50532002000300015},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Nogueira, Raquel T. and Giacomini, Rosana A. and Shepherd, George J. and Imamura, Paulo M.},  year={2002},  month={Jun},  pages={389–391} }