quinoidine

(kwi no̵idēn, -din)

noun

a brownish substance containing a mixture of alkaloids formed in the process of extracting quinine from cinchona, formerly used as a substitute for quinine

Origin: quinoid + -ine

See quinoidine in American Heritage Dictionary 4

noun
A brownish-black mixture of alkaloids remaining after extraction of crystalline alkaloids from cinchona bark, used as a quinine substitute.

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