1. Department of Pharmaceutical Biology and Pharmacology, Institute of Pharmacy, Faculty of Natural Sciences I, Martin Luther University Halle-Wittenberg, Hoher Weg 8, D-06120 Halle (Saale), Germany
2. Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
3. Department of Pharmaceutical Chemistry and Pharmacognosy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
4. Institute of Applied Dermatopharmacy at the Martin Luther University Halle-Wittenberg, Weinbergweg 23, D-06120 Halle (Saale), Germany