POLYMORPHES ANHYDRES DE NITRATE DE METHYLE [(2R,3S,4R,5R)-5-(6-(CYCLOPENTYLAMINO)-9H-PURIN-9-YLE)-3,4-DIHYDROXYTETRAHYDROFURAN-2-YLE)] ET PROCESSUS DE PREPARATION DE CEUX-CI
The present invention provides novel anhydrous polymorph forms of 2R,3S,4R,5R)-5-(6-(cyclopentylamino)-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl nitrate (Compound A). The present invention also provides processes for preparation of the anhydrous polymorphic forms of compound A.