the indoleamines 5-hydroxytryptamine , 5-methoxytryptamine , 5-methoxy-n , n'-dimethyltryptamine and tryptamine ( 10 ( -7 ) to 10 ( -5 ) m ) all reduced potassium-evoked release of tritium , to a maximum of 50 % .
C0027183
dimethyltryptamine
C0041248
tryptamine