@article{oliveira_vieira_braz-filho_mathias_lopes_crotti_uchôa_2009,  title={Spruceanumines A and B, novel plumeran indole alkaloids from Aspidosperma spruceanum(Apocynaceae)},  volume={20},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532009000400019},  DOI={10.1590/S0103-50532009000400019},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Oliveira, Vilma B. and Vieira, Ivo J. Curcino and Braz-Filho, R. and Mathias, Leda and Lopes, Norberto P. and Crotti, Antonio E. M. and Uchôa, Daniel E. de A.},  year={2009},  pages={753–759} }