PSB 0777 ammonium hydrate is a potent and selective adenosine A2A receptor full agonist, exhibiting K i values of 44.4 nM for rat A2A receptors and 360 nM for human A2A receptors. For rat and human A1 receptors, it shows significantly lower affinity with K i values of ≥10000 nM and 541 nM, respectively. The compound demonstrates poor brain penetration and is not orally absorbable. It is of interest in research related to inflammatory bowel disease (IBD) [1] [2] [3].

CHEMBL241987 targets the Adenosine receptor A3 (human)

Istradefylline (KW-6002)(Ki of 2.2 nM) is a selective adenosine A2A receptor (A2AR) antagonist, which is under development in Phase 3 trails. It has been used in trials studying the treatment and basic science of Drug Abuse, Sleep Disorder, Hepatic Impairment, Parkinson's Disease, and Restless Legs Syndrome, among others.

Adenosine 5'-monophosphate monohydrate (5'-AMP) , also known as 5'-adenylic acid, is a nucleotide that is used as a monomer in RNA. It is an ester of phosphoric acid and the nucleoside adenosine. Adenosine 5'-monophosphate monohydrate consists of a phosphate group, the sugar ribose, and the nucleobase adenine. As a substituent it takes the form of the prefix adenylyl-.

N6-(2-Phenylethyl)adenosine (N6-Phenethyladenosine) is an adenosine derivative and an agonist of adenosine receptors with Ki values of 11.8 nM and 30.1 nM for rat and human A1.