the effects of adenosine , the ri site adenosine receptor agonist ( - ) -n6-phenylisopropyladenosine ( pia ) , the ra site agonist 5'-n-ethylcarboxamideadenosine ( neca ) and the p site agonist 2',5'-dideoxyadenosine ( dida ) on force of contraction , cyclic amp ( camp ) and cyclic gmp ( cgmp ) content and on transmembrane action potential were studied in isolated electrically driven left auricles and papillary muscles from guinea pigs .
C0001443
adenosine
C0031484
phenylisopropyladenosine