1. Hacettepe University, Faculty of Pharmacy, Dept. of Pharmacognosy, Sihhiye, Ankara 06100, Turkey
2. National Center For Natural Products Research Institute of Pharmaceutical Sciences, University of Mississippi, University, Mississippi 38677, USA / Present Address: Ege University, Faculty of Engineering, Dept. of Bioengineering, Bornova, Izmir 35100, Turkey
3. National Center For Natural Products Research Institute of Pharmaceutical Sciences, University of Mississippi, University, Mississippi 38677, USA