[1] CSIC, Dept Biomed Chem, Inst Quim Avancada Catalunya, ES-08034 Barcelona, Spain
[2] Univ Barcelona, Fac Pharm, Unit Med Chem, CSIC,Associated Unit, E-08028 Barcelona, Spain
[3] Katholieke Univ Leuven, LIPIT, Dept Mol Celbiol, B-3000 Louvain, Belgium