8-[2-(3-Chlorophenyl)ethenyl]-3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione

8-(3-Chlorostyryl)caffeine (CSC) is an adenosine antagonist with selective activity at the A2a adenosine receptor. 8-(3-Chlorostyryl)caffeine showed 520-fold selectivity in radioligand binding experiments in rat brain. Antagonism of adenylylase by 8-(3-Chlorostyryl)caffeine shows 22-fold selectivity in rat chromaffin cells When 8-(3-Chlorostyryl)caffeine is co-administered with the A1-selective antagonist CPX, It can also further increase exercise activity. 8-(3-Chlorostyryl)caffeine exhibits good MAO-B inhibitory activity in primate mitochondria. 8-(3-Chlorostyryl)caffeine also has excellent A2A receptor affinity[1].

ChEBI: 8-(3-chlorostyryl)caffeine is caffeine substituted at its 8-position by an (E)-3-chlorostyryl group. It has a role as an adenosine A2A receptor antagonist and an EC 1.4.3.4 (monoamine oxidase) inhibitor. It is a trimethylxanthine and a member of monochlorobenzenes. It is functionally related to a caffeine.

[1] 8-(3-Chlorostyryl)caffeine (CSC) is a selective A2-adenosine antagonist in vitro and in vivo