4-Fluoro-5-methoxy-DMT
4-Fluoro-5-methoxy-N,''N-dimethyltryptamine was first described by David E. Nichols team in 2000. It is a potent 5-HT1A agonist. Substitution with the 4-fluorine markedly increased 5-HT1A selectivity over 5-HT2A/2C receptors with potency greater than that of the 5-HT1A agonist 8-OH-DPAT.
The analog compound with the N'',N-dialkyl substituents constrained into a pyrrolidine ring, is a slightly stronger agonist for the 5-HT1A receptor and retains the selectivity over the 5-HT2A/2C receptors.