1. Pharmacognosy
Department, College of Pharmacy, Cairo University, Kasr el Aini st., P.B. 11562, Cairo 12613, Egypt
2. Department
of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
3. National Institute
of Oceanography and Fisheries, Red
Sea Branch, Hurghada 84511, Egypt
4. Phytochemistry
Department, National Research Centre, 33 El Bohouth St, Dokki, Giza 12622, Egypt
5. Leibniz Institute
of Tropical Marine Ecology, Fahrenheit
Str.6, D-28359 Bremen, Germany