@article{pohlit_jabor_amorim_silva_lopes_2009,  title={LC-ESI-MS determination of quassinoids isobrucein B and neosergeolide in Picrolemma sprucei stem infusions},  volume={20},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532009000600010},  DOI={10.1590/S0103-50532009000600010},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Pohlit, Adrian M. and Jabor, Valquíria A. P. and Amorim, Rodrigo C. das N. and Silva, Ellen C. Costa e and Lopes, Norberto P.},  year={2009},  pages={1065–1070} }