@article{almeida_leitão_silva_barbosa_pinto_2010,  title={Counter-Current chromatography separation of isatin derivatives using the sandmeyer methodology},  volume={21},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532010000400025},  DOI={10.1590/S0103-50532010000400025},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Almeida, Márcia R. and Leitão, Gilda G. and Silva, Bárbara V. and Barbosa, Jussara P. and Pinto, Angelo C.},  year={2010},  pages={764–769} }