(Sp)-8-bromo-cAMPS is a nucleoside 3',5'-cyclic phosphorothioate having 8-bromoadenine as the nucleobase (the Sp-stereoisomer). It has a role as a protein kinase agonist. It is a nucleoside 3',5'-cyclic phosphorothioate, a member of purines and an organobromine compound. It is functionally related to a 3',5'-cyclic AMP.