Abdel-Hamid, M. A. M., Elkazak, A. M., Sead, M. H., & Mohamed, O. F. (2012). Synthesis of some new pyrazolylfuropyrimidinethiones and triazolofuropyrimidinethiones. European Journal of Chemistry, 3(3), 273–278. https://doi.org/10.5155/eurjchem.3.3.273-278.605