n6-cyclopentyladenosine n6-cyclopentyladenosine n6-cyclopentyladenosine (cpa) is a drug which acts as a selective adenosine a1 receptor agonist. it has mainly cardiovascular effects with only subtle alterations of behavior. cpa is widely used in scientific research into the adenosine receptors and has been used to derive a large family of derivatives. n6-cyclopentyladenosine names iupac name n6-cyclopentyladenosine systematic iupac name (2r,3r,4s,5r)-2--5-(hydroxymethyl)oxolane-3,4-diol identifiers cas number 41552-82-3 y 3d model (jsmol) interactive image chemspider 571479 n pubchem cid 657378 unii 7lg47vg1id y comptox dashboard (epa) dtxsid80961807 inchi inchi=1s/c15h21n5o4/c21-5-9-11(22)12(23)15(24-9)20-7-18-10-13(16-6-17-14(10)20)19-8-3-1-2-4-8/h6-9,11-12,15,21-23h,1-5h2,(h,16,17,19)/t9-,11-,12-,15-/m1/s1 nkey: sqmwsbkshwarhu-sdbhatresa-n ninchi=1/c15h21n5o4/c21-5-9-11(22)12(23)15(24-9)20-7-18-10-13(16-6-17-14(10)20)19-8-3-1-2-4-8/h6-9,11-12,15,21-23h,1-5h2,(h,16,17,19)/t9-,11-,12-,15-/m1/s1key: sqmwsbkshwarhu-sdbhatrebv smiles c1ccc(c1)nc2=nc=nc3=c2n=cn34(((o4)co)o)o properties chemical formula c15h21n5o4 molar mass 335.364 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references