1. Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
2. Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
3. Department of Microbiology, University of Helsinki, 00014 Helsinki, Finland
4. Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow G4 0RE, UK
5. Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK
6. Department of Environmental Chemistry, Swiss Federal Institute of Aquatic Science and Technology (Eawag), 8600 Duebendorf, Switzerland