1. School of Life Sciences, Pharmacy and Chemistry, Kingston University, Kingston-upon-Thames, KT1 2EE, U.K.
2. Natural Products Research Group, Department of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, U.K.
3. Department of Biochemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
4. Biodiversity Economy, South African National Biodiversity Institute, P.O. Box 52099, 4007 Berea Road, Durban, South Africa
5. School of Chemistry and Physics, University of KwaZulu-Natal, Durban, 4041, South Africa
6. Institute of Biology, NAWI Graz, University of Graz, 8010 Graz, Austria
7. Parc Botanique et Zoologique de Tsimbazaza, Rue Fernand Kassanga, Antananarivo 101, Madagascar