<unk>  also known as N-acetyl-5-methoxytryptamine, is a substituted tryptamine and a derivative of serotonin (5-hydroxytryptamine). It is structurally related to N-acetylserotonin (normelatonin; N-acetyl-5-hydroxytryptamine), which is the chemical intermediate between serotonin and<unk> in the body. Synthetic<unk> receptor agonists used in medicine like ramelteon, tasimelteon, agomelatine, and piromelatine (still in clinical trials) are analogues of<unk>
Melatonin 
Etoperidone
Sertindole
Tropisetron
Zolpidem
Cilansetron
Chloracyzine
Alosetron