1. Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, 19697-64499 Tehran, Iran
2. Organisch-Chemisches Institut der Universitaet Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
3. Department of Environmental Sciences, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, 14117-13116 Tehran, Iran
4. Medical Biology Research Center, Kermanshah University of Medical Sciences, 67158-47141 Kermanshah, Iran