1. Department of Cell and Molecular BiologyUppsala University, BMC, Biomedical Center Box 596 Uppsala Sweden
2. Sosei Heptares Steinmetz Granta Park, Great Abington Cambridge CB21 6DG UK
3. Departament of Organic ChemistryFaculty of FarmacyUniversidade de Santiago de Compostela Spain
4. Centro Singular de Investigación en Química Biolóxica y Materiais Moleculares (CIQUS)Universidade de Santiago de Compostela Spain
5. Present address: H. Lundbeck A/S Ottiliavej 9 2500 Valby Denmark