Tryptamine is a monoamine alkaloid found in plants, fungi, and animals. It contains an indole ring structure, and is structurally similar to the amino acid tryptophan, from which it derives its name.

Fluoxetine(LY110140) is an antidepressant of the selective serotonin reuptake inhibitor (SSRI)class.

Mosapride citrate (AS-4370 citrate) is a gastroprokinetic agent that acts as a selective 5HT4 agonist.