1. Department of Chemistry and Applied Biosciences ETH Vladimir-Prelog-Weg 1 CH-8093 Zurich Switzerland
2. Higher Institute of Technologies and Applied Sciences (InSTEC) University of Havana Ave. S. Allende 1110 10600 Havana Cuba
3. Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Facultad de Ciencias Químicas Universidad Complutense de Madrid 28040 Madrid Spain
4. Univ. Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 F-35000 Rennes France
5. Department of Chemistry and Biochemistry University of Arizona, Tucson 1306 E. University Blvd. Tucson AZ 85719 USA