[1] Tech Univ Munich, Dept Chem, Lehrstuhl Organ Chem 2, D-85747 Garching, Germany
[2] Hebrew Univ Jerusalem, Dept Pharmaceut, IL-91904 Jerusalem, Israel
[3] Hebrew Univ Jerusalem, Dept Organ Chem, IL-91904 Jerusalem, Israel
[4] Univ Naples Federico 2, I-80131 Naples, Italy