2'- O- (6- Aminohexylcarbamoyl)adenosine- 3', 5'- cyclic monophosporothioate, Rp-isomer; immobilized on agarose gel (Rp-2'-AHC-cAMPS-Agarose)[2'- O- (6- Aminohexylcarbamoyl)adenosine- 3', 5'- cyclic monophosporothioate, Rp-isomer; immobilized on agarose gel (Rp-2'-AHC-cAMPS-Agarose)]