1. Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
2. Université de Lyon, Université Claude Bernard Lyon I, CNRS, INSA, CPE, UMR 5246, ICBMS, rue Victor Grignard, F-69622 Villeurbanne Cedex, France
3. Paul Scherrer Institut, CH-5232 Villigen, Switzerland