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Credit
From left too right: A182555, Original preparation of quinine hydrochloride by Pelletier, 1810-1840. A182561, Original preparation of quinine by Pelletier and Caveton, 1820. A182556, Original preparation of quinine acetate by Pelletier, 1810-1840. Detail image of labels, graduated black perspex background. Science Museum, London. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.