1 to test the possibility that adenosine receptors exist within the trachea of the guinea-pig , an attempt has been made to identify a compound with adenosine antagonist activity in this tissue.2 quinidine , phentolamine , phenoxybenzamine , 2-2'-pyridylisatogen tosylate ( pit ) and caffeine were tested for antagonism of spasmolytic responses to adenosine , adenosine 5'-triphosphate ( atp ) and adenine on the guinea-pig isolated trachea.3 quinidine ( 10 and 25 mug/ml ) , phentolamine ( 10 and 30 mug/ml ) and phenoxybenzamine ( 10 mug/ml ) had little or no effect on response to adenosine , atp and adenine .
C0001443
adenosine
C0001480
atp