1. Institut for ChemistryHumboldt Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
2. Medicinal Chemistry DepartmentFaculty of PharmacyAssiut University Assiut 71526 Egypt
3. Department of Molecular BiologyUniversity of Duisburg-Essen Hufelandstr. 55 45147 Essen Germany