1. Department of Organic and Pharmaceutical Chemistry; Faculty of Pharmacy; Complutense University; Plaza Ramón y CajaL s/n 28040 Madrid Spain
2. Department of Organic Chemistry and Biochemistry; Technische Universität Darmstadt, A; larich-Weiss-Strasse 4 64287 Darmstadt Germany
3. Departamento de Ciencia de Proteínas; CIB-CSIC; C/Ramiro denMaeztu 9 28040 Madrid Spain
4. Institut für Physiologische Chemie; Tierärztliche Fakultät; Ludwig-Maximilians-Universität München; Veterinärstrasse 13 80539 München Germany
5. Department of Organic Chemistry; Faculty of Science; Autonoma University of Madrid; Spain
6. Ikerbasque; Basque Foundation for Science; Maria Diaz de Haro 13 48009 Bilbao Spain
7. Department of Organic Chemistry II, Faculty of Science & Technology; University of the Basque Country; 48940 Leioa Bizkaia Spain