@article{santos_lima_braz filho_silveira_2006,  title={Diterpenes from Erythroxylum barbatum},  volume={17},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532006000700016},  DOI={10.1590/S0103-50532006000700016},  number={7},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Santos, Cláudio C. dos and Lima, Mary Anne S. and Braz Filho, Raimundo and Silveira, Edilberto R.},  year={2006},  month={Nov},  pages={1304–1308} }