Chemical and Bioactivity Studies of the Red Sea Soft Corals: Sinularia polydactyla (Ehrenberg) and Lobophytum crassum (Marenzellar) (Fam. Alcyoniidae) Thesis submitted by Nabil Mohammed Aboul-Fotouh Selim Assistant Lecturer, Pharmacognosy Department, Faculty of Pharmacy Cairo University For the degree of Ph.D. in Pharmaceutical Sciences (Pharmacognosy) Under the supervision of Prof. Dr. Elsayed Ali Hassan Aboutabl Pharmacognosy Department, Faculty of Pharmacy, Cairo University Prof. Dr. Shadia Mazloum Azzam Pharmacognosy Department, Faculty of Pharmacy, Cairo University Prof. Dr. Camilia George Michel Pharmacognosy Department, Faculty of Pharmacy, Cairo University Prof. Dr. Ahmed Abdel Fattah Hussein Chemistry of Medicinal plants Department, National Research Center, Cairo Pharmacognosy Department Faculty of Pharmacy Cairo University A.R.E 2012