The present invention relates to compositions comprising analogues of purine nucleosides containing a ring-expanded ("fat") heterocyclic ring, in place of purine, and an unmodified or modified sugar residue, pharmaceutically acceptable derivatives of such compositions, as well as methods of use thereof. In particular, these compositions may be utilized in the treatment of certain cancers, bacterial, fungal, parasitic, and viral infections, including, but not limited to, Acquired Immunodeficiency Syndrome (AIDS), hepatitis, Epstein-Barr and cytomegalovirus.

La présente invention concerne des compositions comportant des analogues des nucléosides de purine contenant ("graisse") un anneau hétérocyclique anneau-augmenté, au lieu de la purine, et un résidu non modifié ou modifié de sucre, pharmaceutiquement dérivés acceptables de telles compositions, aussi bien que des méthodes d'utilisation en. En particulier, ces compositions ne peuvent être utilisées dans le traitement de certains cancers, infections bactériennes, fongiques, parasites, et virales, y compris, mais être limitées à, syndrome acquis d'immunodéficit (SIDA), hépatite, Epstein-Barr et cytomégalovirus.

 
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