in electrically driven ( 2 hz ) guinea-pig isolated left atria , adenosine ( 10 ( -6 ) to 10 ( -3 ) m ) or 2-chloroadenosine ( 10 ( -8 ) to 10 ( -7 ) m ) produced concentration-dependent decreases in isometric tension .
C0001443
adenosine
C0000275
2-chloroadenosine