the action of morphine was registered as its influence on bladder hyperactivity induced by central catecholaminergic stimulation with 1-dihydroxyphenylalanine ( l-dopa ) after peripheral decarboxylase inhibition , and as its action on the response to regional injection of receptor agonists ( acetylcholine ( ach ) , substance p ( sp ) ) and peripheral motor nerve stimulation ( pns ) .
C0013023
dihydroxyphenylalanine
C0023570
l-dopa