SUBSTITUTED QUINAZOLINES.

摘要

This invention relates to the discovery of prodrugs of substituted analogues of the selective platelet lowering agent anagrelide which have reduced potential for cardiovascular side-effects and which should therefore lead to improved patient compliance and safety in the treatment of myeloproliferative diseases. More specifically, the present invention relates to prodrugs of certain imidazoquinazoline derivatives which have the general formula (I) shown below wherein the substituents have the meanings defined in claim 1 and which have utility as platelet lowering agents in humans. The compounds of the present invention function by inhibiting the formation of blood platelets.