@article{silva_netto_costa_2004,  title={The first synthesis of (±)-3,4-dihydroxy-8,9-methylenedioxypterocarpan, an antitumoral agent and its coumestan derivative},  volume={15},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532004000600029},  DOI={10.1590/S0103-50532004000600029},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Silva, Alcides J. M. da and Netto, Chaquip D. and Costa, Paulo R. R.},  year={2004},  month={Nov},  pages={979–981} }