cinchonidine

Cin*chon"i*dine, n. Etym: [From Cinchona.] (Chem.) Defn: One of the quinine group of alkaloids, found especially in red cinchona bark. It is a white crystalline substance, C19H22N2O, with a bitter taste and qualities similar to, but weaker than, quinine; -- sometimes called also cinchonidia.

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