"Cinchonidine" is a word in ENGLISH

cinchonidine ENGLISH
Definition:

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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cinchonine ENGLISH

One of the quinine group of alkaloids isomeric with and resembling cinchonidine; -- called also cinchonia.

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