1. Laboratory of Biomolecular NMR, Institute for Research in Biomedicine, Parc Científic de Barcelona, Baldiri Reixac, 10, 08028 Barcelona, Spain, European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, 22603 Hamburg, Germany, Institute of Crystallography, Russian Academy of Sciences, Leninsky pr. 59, 117333 Moscow, Russia, Department of Environmental Chemistry, IIQAB-CSIC, Jordi Girona 18, Barcelona 08034, Spain, and Departament de Química Orgànica, Universitat de Barcelona, Martí i...