intravenous bolus injections of various adenosine analogues caused dose-dependent , aminophylline-blockable reductions in heart rate with a potency order of 5'- ( n-ethylcarboxyamido ) -adenosine ( neca ) -78:2-chloroadenosine-17 : adenosine-1 .
C0000275
2-chloroadenosine
C0001443
adenosine