Hydroxytryptamine

Hydroxytryptamine (hydroxy-T, HT, HO-T, or OH-T) may refer to:

1-Hydroxytryptamine 2-Hydroxytryptamine 4-Hydroxytryptamine 5-Hydroxytryptamine (5-HT; serotonin) 6-Hydroxytryptamine 7-Hydroxytryptamine

See also Methoxytryptamine Hydroxy-DMT