Anhidridni polimorf (2R,3S,4R,5R)-5-(6-(ciklofentilamino)-9H-purin-9-il)-3,4-dihidroksite- trahidrofuran-2-il))metil nitrat in postopki njegove priprave
The present invention provides a novel anhydrous polymorph form of [(2R,3S,4R,5R) -5-(6-(cyc]opentylamino)-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 form of compound A, compositions containing the polymorph form, and use of the polymorph form for the preparation of ophthalmic compositions.