1. Natural and Life Sciences Department; Faculty of Sciences; Mohamed Boudiaf University; BP 166 Msila Msila 28000 Algeria
2. Laboratory of Ethnobotany and Natural Substances; Department of Natural Sciences; Ecole Normale Superieure (ENS), Kouba; BP 92 Kouba 16308 Algeria
3. Department of Pharmaceutical and Pharmacological Sciences; University of Padova; Via Marzolo 5 IT-35100 Padova Italy
4. Department of Pharmacy; University of Pisa; Via Bonanno 6 IT-56126 Pisa Italy
5. School of Pharmacy; University of Camerino; via S. Agostino 1 IT-62032 Camerino Italy