1. Departamento de Química Orgánica
2. Universidad Autónoma de Madrid
3. 28049-Madrid
4. Spain
5. Department of Chemistry and Pharmacy
6. Interdisciplinary Center for Molecular Materials (ICMM)
7. Friedrich-Alexander-Universitaet Erlangen-Nuernberg
8. 91058 Erlangen
9. Germany
10. Institute for Advanced Research in Chemical Sciences (IAdChem)