FAEFHI
FAEFHI, also known as 4-(2-aminoethyl)-5-hydroxyindole, is a serotonin receptor modulator of the indole group related to serotonin and other tryptamines. It is a positional isomer of serotonin in which the ethylamine side chain at the 3 position of the indole ring system has been moved to the 4 position.