@article{epifanio_pinheiro_alves_2005,  title={Polyketides from the marine sponge Plakortis angulospiculatus},  volume={16},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532005000800010},  DOI={10.1590/S0103-50532005000800010},  number={6b},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Epifanio, Rosângela de A. and Pinheiro, Leandro S. and Alves, Natalia C.},  year={2005},  month={Nov},  pages={1367–1371} }