2-(Purin-9-yl)-tetrahydrofuran-3,4-diol derivatives.

摘要

There are provided according to the invention novel compounds of formula (I), wherein R<1>, R<2>, R<3>, Z<1>, Z<2>, Z<3> and Z<4> are as defined in the specification, processes for preparing them, formulations containing them and their use in therapy for the treatment of inflammatory diseases.