8-Cyclopentyl-1,3-dipropylxanthine

8-Cyclopentyl-1,3-dipropylxanthine (DPCPX) is a research compound that functions as an adenosine A1 receptor antagonist. It is an oxopurine derivative substituted with propyl groups at positions 1 and 3 and a cyclopentyl group at position 8, and it also acts as an inhibitor of phosphoric diester hydrolases.