Quinidine definitions

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A colorless crystalline alkaloid, C20 H24 N2 O2 , resembling quinine and used in treating malaria and cardiac arrhythmias.
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A colorless, crystalline alkaloid, C20H24N2O2, isomeric with and resembling quinine, extracted from cinchona bark.
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A bitter alkaloid, C20 H24 N2 O2 , that is a stereoisomer of quinine, used in the form of its salts to treat malaria and certain cardiac arrhythmias.
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(organic chemistry, medicine) An isomer of quinine that is used as an antiarrhythmic agent.
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