@article{cruz_teixeira_2004,  title={Polyprenylated benzophenones with a tricyclo [4.3.1.1(3,8)]undecane skeleton from Clusia obdeltifolia},  volume={15},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532004000400010},  DOI={10.1590/S0103-50532004000400010},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Cruz, Frederico G. and Teixeira, Josanaide S. R.},  year={2004},  month={Jul},  pages={504–508} }