other structural analogues of 5-ht that shared the 5-ht blocking effect were 5-methoxytryptamine , 5,6-dihydroxytryptamine , and n , n-dimethyltryptamine although these compounds were considerably less potent than 5-ht as blockers or as agonists .
C0036751
5-ht
C0000589
5-methoxytryptamine