the serotonin ( 5-ht ) agonists , d-lysergic acid diethylamide ( lsd ) and 5-methoxytryptamine ( 5-me-o-t ) , dose dependently inhibited the k+-evoked outflow of [ 3h ] 5-ht from preloaded rat hippocampal slices in vitro , indicating activation of the 5-ht autoreceptor .
C0000589
5-methoxytryptamine
C0036751
5-ht