1. Istituto per la Chimica di Molecole di Interesse Biologico (ICMIB) del CNR, Via Campi Flegrei 34, Ex Comprensorio Olivetti, 80078 Pozzuoli (Na), Italy, SeaTek Marine Biotechnology, Inc., Surrey, British Columbia, Canada V4A 7M4, and Departments of Chemistry and Oceanography (EOS), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 %afontana@icmib.na.cnr.it