Organic bicyclic compounds that consist of a seven-membered ring fused with a thiophene ring; thiophenes are a five-membered ring with four carbon atoms and one sulfur atom.
Ketotifen fumaratin is an H1 receptor antagonist. In its ophthalmic form, it is used to treat allergic conjunctivitis, or the itchy red eyes caused by allergies. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio.