Terbutaline is a potent and selective β2-adrenergic receptor agonist with IC50 of 53 NM, it has little or no effect on alpha-adrenergic receptors.

Idazoxan HCl (RX781094A; RX-781094 hydrochloride) is a potent and selective α2 adrenergic receptor antagonist, and an antagonist for the imidazoline receptor.

DPCPX (PD-116948; PD116948) is a xanthine derivative acting as a selective A1 adenosine receptor antagonist.

Regadenoson (CVT3146), a novel and potent A2A adenosine receptor agonist, is a coronary vasodilator that is commonly used in pharmacologic stress testing.

CGS 21680 HCl (CGS21680; CGS-21680), the hydrochloride salt of CGS 21680, is a potent and specific agonist of adenosine A2 receptors with potential antideppressant activity.

Bopindolol Malonate (CTK-8F8315; LS-120081; HE-393689; D-01794) is a potent beta adrenoceptor antagonist with the potential to be used for essential and renovascular hypertension.

BAY-545 is a novel, potent and selective antagonist of A2B adenosine receptor with an IC50 of 59 nM.

Adenosine is an endogenous nucleoside consisting of an adenine attached via a β-N₉-glycosidic bond to a ribose.

Vipadenant (formerly BIIB-014; CEB-4520; V-2006; VER-11135) is a novel potent, selective and orally bioactive antagonist of adenosine A2A receptor with immunomodulatory and antidegenerative effects.

Etrumadenant (AB928; AB-928) is a first-in-class, clinical stage, oral and dual antagonist of the A2aR and A2bR adenosine receptors with potential anticancer and immunomodulatory activity.