@article{1976,  title={The chemical composition of Amazonian plants <sup>(</sup><sup>)</sup>},  volume={6},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921976062237},  DOI={10.1590/1809-43921976062237},  number={2},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  year={1976},  month={Jun},  pages={237–239} }