1. Department of Organic Chemistry, NSR-Center for Molecular Structure, Design and Synthesis, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands, and TNO Prevention and Health, Division of Vascular and Connective Tissue Research, Gaubius Laboratorium, Zernikedreef 9, 2333 CK, Leiden, The Netherlands