Quinoidine


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Qui`noid´ine


n.1.(Med. Chem.) A brownish resinous substance obtained as a by-product in the treatment of cinchona bark. It consists of a mixture of several alkaloids.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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He called the new substance "animal quinoidine" and devised a standardization process to estimate the degree of fluorescence attributable to this common factor.
Medical chemists and the origins of clinical chemistry in Britain (circa 1750-1850)

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