CCPA (biochemistry)

2-Chloro-N6-cyclopentyladenosine (CCPA) is a specific receptor agonist for the Adenosine A1 receptor. It is similar to N6-cyclopentyladenosine. Due to CCPA's high affinity for Adenosine A1 receptors, its tritiated derivative [3H]CCPA can be used as a diagnostic tool for detecting the receptors in tissue with low receptor density.