atl-444 atl-444 atl-444 is a drug which acts as a potent and reasonably selective antagonist for the adenosine receptors a1 and a2a. it has been used to study the role of the adenosine receptor system in the reinforcing action of cocaine, as well as the development of some cancers. atl-444identifiers iupac name (1s,3r)-1--3-methylcyclohexan-1-ol cas number867054-13-5 ypubchem cid11616539chemspider9791288uniiy29e2dv2vuchemical and physical dataformulac17h19n5omolar mass309.373 g·mol−13d model (jsmol)interactive image smiles c#ccn1c=nc2=c1n=c(c#c3(ccc(c3)c)o)n=c2n inchi inchi=1s/c17h19n5o/c1-3-9-22-11-19-14-15(18)20-13(21-16(14)22)6-8-17(23)7-4-5-12(2)10-17/h1,11-12,23h,4-5,7,9-10h2,2h3,(h2,18,20,21)/t12-,17-/m1/s1key:vejleefuxfqshp-sjkoyzfvsa-n