Tite, Tony; Tomas, Loic; Docsa, Tibor; Gergely, Pal; Kovensky, José; Gueyrard, David; Wadouachi, Anne Tetrahedron Letters, 2012, vol. 53, # 8 p. 959 - 961 doi: 10.1016/j.tetlet.2011.12.049