@article{araújo_lima_silveira_2009,  title={Pterocarpans and a novel flavanone from harpalyce brasiliana roots},  volume={20},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532009000500019},  DOI={10.1590/S0103-50532009000500019},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Araújo, Renata M. de and Lima, Mary Anne S. and Silveira, Edilberto R.},  year={2009},  pages={935–938} }