1. Department of Botany, Faculty of Science, Kasetsart University, Bangkok, Thailand
2. Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
3. Department of Organic Chemistry, University of Vienna, Vienna, Austria
4. Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, Thailand
5. Department of Chemistry, University of Natural Resources and Life Sciences (BOKU), Tulln, Austria
6. Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo/Turku, Finland