1. Department of Organic Chemistry, University of Debrecen, P. O. Box 400, 4002 Debrecen, Hungary
2. Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1., 4032 Debrecen, Hungary
3. Department of Physical Chemistry, University of Debrecen, Egyetem tér 1., 4032 Debrecen, Hungary
4. Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institutions of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China