SR144528 is a drug that acts as a potent and highly selective CB2 receptor inverse agonist with a Ki of 0.6nM at CB2 and 400nM at the related CB1 receptor. It is used in scientific research for investigating the function of the CB2 receptor as well as for studying the effects of CB1 receptors in isolation as few CB1 agonists that do not also show significant activity as CB2 agonists are available.
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