these responses were not antagonized by methysergide ( 0.01 mug/ml ) , and the relaxation was not antagonized by tetrodotoxin ( 0.1 mug/ml ) or a combination of propranolol ( 0.05 mug/ml ) and phentolamine ( 0.1 mug/ml ) .3 neither mepyramine ( 0.1 mug/ml ) nor methysergide ( 0.01 mug/ml ) antagonized the contractions produced by nerve stimulation in vagus nerve/oesophagus and remak nerve/rectum preparations.4 5-hydroxytryptamine ( 2 mug/ml ) in the presence of methysergide ( 0.01 mug/ml ) , inhibited the contractions produced by nerve stimulation in remak nerve/rectum and vagus nerve/oesophagus preparations.5 adenosine , adenosine 5'-phosphate ( amp ) , adenosine 5'-diphosphate ( adp ) and adenosine 5'-triphosphate ( atp ) , in order of decreasing potency , produced slow contractions in most oesophagus preparations .
C0001443
adenosine
C0001480
adenosine 5