Quinidine is a pharmaceutical agent that acts as a class I antiarrhythmic agent in the heart. It is a stereoisomer of quinine, originally derived from the bark of the cinchona tree.
Chemically it is known as (2-ethenyl-4-azabicyclo*oct-5-yl)- (6-methoxyquinolin-4-yl)-methanol OR
6'-mehoxycinchonan-9-ol
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