1. Chemistry Laboratories, Agricultural University of Athens, Iera Odos 75, GR 118 55 Athens, Greece, Natural Product Synthesis and Bioorganic Chemistry Laboratory, Institute of Physical Chemistry, NCSR “Demokritos”, P.O. Box 60228, GR 153 10 Ag. Paraskevi, Greece, Yasoo Health, Inc., 2109 West Market Street, Johnson City, Tennessee 37602, and Department of Chemistry, East Tennessee State University, Box 70695, Johnson City, Tennessee 37614