Varga, Gergely; Docsa, Tibor; Gergely, Pal; Juhasz, Laszlo; Somsak, Laszlo Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 6 p. 1789 - 1792 doi: 10.1016/j.bmcl.2013.01.042