Dequalinium chloride is a quinolinium ion composed of symmetrical quaternary quinolinium units, one 4-amino-2-methylquinolin-1-yl group on each end of the molecule in place of a methyl hydrogen. It is a quaternary ammonium cation and forms an organic chloride salt. Its biological roles include antifungal agent and inhibitor of mitochondrial NADH ubiquione reductase. Medically, dequalinium chloride is the active ingredient of pharmaceuticals against bacterial infections and malaria; it has been applied as an antifungal, antinematadol and antiseptic drug.
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