certain substances , 2-bromolysergic acid diethylamide , dimethyltryptamine ( 3- ( 2-dimethylaminoethyl ) indole ) , 2-methyldimethyltryptamine ( 3- ( 2-dimethylaminoethyl ) -2-methylindole ) , and 5-benzyloxydimethyltryptamine ( 5-benzyloxy-3- ( 2-dimethylaminoethyl ) indole ) , antagonize the effects of 5-hydroxytryptamine on the rat fundus strip more than those of tryptamine .
C0027183
dimethyltryptamine
C0041248
tryptamine