Pyrazolo[3

Hassan, G. S., H. H. Kadry, S. M. Abou-Seri, and M. M. Ali, "Synthesis and in vitro cytotoxic activity of novel pyrazolo[3,4-d]pyrimidines and related pyrazole hydrazones toward breast adenocarcinoma MCF-7 cell line ", Bioorganic & Medicinal Chemistry, vol. 19 , pp. 6808–6817, 2011.