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Quadrangularis - with four angles.
Quadrangulispinus - with four angled spines.
Quadricostatus - with four ribs.
Quadrispinus - with four spines.
Quinine - an alkaloid, found in the bark of the Cinchona tree, is used to treat malaria, a tropical parasitic disease carried by mosquitoes. Quinine is an essential bitter ingredient of certain drinks e.g. Indian tonic water, where it can be recognised by its blue fluorescence under ultra-violet (black) light illumination.
Structure of Quinine