Dorzolamide
Dorzolamide is 5,6-Dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-dioxide in which hydrogens at the 4 and 6 positions are substituted by ethylamino and methyl groups, respectively (4S, trans-configuration). A carbonic anhydrase inhibitor, it is used as the hydrochloride in ophthalmic solutions to lower increased intraocular pressure in the treatment of open-angle glaucoma and ocular hypertension. It has a role as an EC 4.2.1.1 (carbonic anhydrase) inhibitor, an antihypertensive agent and an antiglaucoma drug. It is a sulfonamide and a member of thiophenes.