1. Laboratory
of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
2. Department
of Biology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
3. Department
of Chemistry and Biochemistry and Department of Pharmacology, School
of Medicine, University of California−San Diego, La Jolla, California 92093-0601, United States
4. Chemical
Laboratories, Agricultural University of Athens, Athens 11855, Greece