@article{1973,  title={The chemical composition of Amazonian plants <sup>(</sup><sup>)</sup>},  volume={3},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921973031063},  DOI={10.1590/1809-43921973031063},  number={1},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  year={1973},  month={Apr},  pages={63–64} }