Associate Professor Wandee Gritsanapan, Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University cordially welcomed Dr.Harald Greger, Chemodiversity Research Group, Department of Systematic and Evolutionary Botany, University of Vienna, Austria as a guest lecturer on the topic of ’Photochemistry research based on chemotaxonomic and biological aspects’ at the Faculty of Pharmacy, Mahidol University for MUPY staff and graduate students.