1. Department of Chemistry,
Faculty
of Science, and Center for Petroleum, Petrochemicals and Advanced
Materials, Chulalongkorn University, Phyathai
Road, Pathumwan, Bangkok 10330, Thailand
2. Department of Chemistry and
Biochemistry, University of Berne, Freiestrasse
3, CH-3012 Bern, and Institute of Organic Chemistry, University of Zürich, Winterthurerstrasse 190,
CH-8050 Zürich, Switzerland