@article{carvalho_carvalho_braz-filho_2000,  title={Chemical constituents from Ouratea floribunda: complete¹H and 13C NMR assignments of atranorin and its new acetyl derivative},  volume={11},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532000000200007},  DOI={10.1590/S0103-50532000000200007},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Carvalho, Mário G. de and Carvalho, Geizi J. A. de and Braz-Filho, Raimundo},  year={2000},  month={Mar},  pages={143–147} }