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Martins, G. R., Napolitano, H. B., Camargo, L. T. F. M., & Camargo, A. J. (2012). Structure-activity relationship study of rutaecarpine analogous active against central nervous system cancer. Journal of the Brazilian Chemical Society, 23(12), 2183–2190. doi:10.1590/s0103-50532013005000004 
10.1590/s0103-50532013005000004