1. Laboratory for Bioorganic Chemistry of Nucleic AcidsDepartment of Structural Biology and ChemistryInstitut PasteurCNRS UMR3523 28, rue du Docteur Roux 75724 Paris Cedex 15 France
2. University of Paris SaclayCNRSiSSBUEVEGenopole 5 Rue Henri Desbruères 91030 Evry France
3. Department of Medicinal ChemistryInstitute for Medical ResearchKU Leuven Herestraat, 49 Leuven 3000 Belgium