the 5-ht receptor agonist 5-methoxytryptamine inhibited in a concentration-dependent manner the electrically-evoked release of [ 3h ] -5-ht with ic50 values of 560 nmol/l and of 34 nmol/l when the stimulations were delivered at 3 hz and 1 hz , respectively .
C0000589
methoxytryptamine
C0036751
5-ht