1. Laboratory of Clinical Investigation National Institute on Aging National Institutes of Health Baltimore Maryland 21224
2. Laboratory of Medicinal Chemistry and Neuroengineering Department of Chemistry Medical University of Lublin 20‐093 Lublin Poland
3. Institut de Chimie Organique et Analytique ICOA CNRS UMR7311 BP6759 45067 Orléans Cedex 2 France