Compounds of the following formula (I): ##STR1##

where a, b, R1, R2, R3, R4 and R6 are described herein, are useful as inhibitors of platelet adenosine diphosphate. Pharmaceutical compositions containing these compounds, methods of using these compounds as antithrombotic agents and processes for synthesizing these compounds are also described herein.


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> Bifunctionalized polyester material for surface treatment and biomodification

> Substituted tricyclic himbacine derivatives that are useful as thrombin receptor antagonists

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