5-Carboxamidotryptamine (5-CT) is a tryptamine derivative closely related to the neurotransmitter serotonin.
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Formula | C11H13N3O |
Molar mass | 203.245 g·mol−1 |
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5-CT acts as a non-selective, high-affinity full agonist at the 5-HT1A, 5-HT1B, 5-HT1D, 5-HT5A, and 5-HT7 receptors, as well as at the 5-HT2, 5-HT3, 5-HT6 receptors with lower affinity.[1][2][3] It has negligible affinity for the 5-HT1E and 5-HT1F receptors.[4] 5-CT binds most strongly to the 5-HT1A receptor and it was once thought to be selective for this site.[5][6] Recently, a close derivative of 5-CT, AH-494 has been shown to function as an agonist of 5-HT7, although being more selective over 5-HT1A.[7] Structural study indicated residue Ser5x43 might play critical roles in the selectivity of 5-CT across the serotonin receptor family.[8]