Militsopoulou, Maria; Tsiakopoulos, Nikolaos; Chochos, Christos; Magoulas, George; Papaioannou, Dionissios Tetrahedron Letters, 2002, vol. 43, # 14 p. 2593 - 2596 doi: 10.1016/S0040-4039(02)00335-0