Alosetron
Alosetron is a pyrido[4,3-b]indole compound having a 5-methyl-1H-imidazol-4-ylmethyl group at the 2-position. It has a role as a serotonergic antagonist, an antiemetic and a gastrointestinal drug. It is a pyridoindole and a member of imidazoles.