when atp , adp , amp and ad were assayed in the presence of the adrenergic and cholinergic blocking agents , ergotamine , 10 ( -6 ) m , propranolol , 5 x 10 ( -7 ) m and atropine , 10 ( -6 ) m , all these purine derivatives , including ad , caused a significant increase in the basal acid secretion .
C0001480
atp
C0001443
ad