What does cinchonine mean?
Cinchonine is a bitter, white, crystalline alkaloid found naturally in the bark of cinchona trees, the South American plants that also yield quinine. Chemically close to its better-known relative, it differs by lacking a methoxy group, and its mirror-image stereoisomer is known as cinchonidine. Though it was once investigated as an antimalarial and febrifuge, its practical importance today lies chiefly in the laboratory: because it forms well-characterized crystalline salts, cinchonine has long been valued as a resolving agent for separating racemic mixtures into their individual enantiomers. The word derives from Cinchona, itself named after the Countess of Chinchón, whose association with the 'Peruvian bark' cure entered medical lore in the seventeenth century. Cinchonine remains a technical term, encountered mainly in organic chemistry texts, historical accounts of malaria treatment, and discussions of natural-product chemistry rather than in general usage.
nounA bitter, crystalline alkaloid obtained from the bark of cinchona trees, closely related to quinine and used chiefly in chemistry and pharmacology.
- A bitter, white, crystalline alkaloid (C19H22N2O) found in cinchona bark, used as a chemical reagent and resolving agent and studied for its pharmacological properties.
"The chemist isolated a small quantity of cinchonine from the powdered cinchona bark."
"Early chemists struggled to separate cinchonine from the other alkaloids present in cinchona bark."
"Because it forms readily distinguishable salts, cinchonine has long served as a resolving agent for racemic mixtures in organic chemistry."
Rarely pluralized; the plural would appear only when referring to multiple samples or preparations of the compound, since it is normally an uncountable substance noun.
"The cabinet contained labeled vials of various cinchonines prepared over decades."
Named after the Countess of Chinchón, whose legendary 17th-century cure from fever by Peruvian bark helped introduce cinchona alkaloids to European medicine.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cinchonine
The word cinchonine comes from Cinchona, the botanical name of the genus of cinchona trees, which was named in honor of the Countess of Chinchón, a seventeenth-century Spanish noblewoman associated with the introduction of cinchona bark (the 'Peruvian bark') into European medicine. The suffix -ine marks it as an alkaloid. Its closest lexical relatives are the other cinchona-derived alkaloids, notably quinine and cinchonidine.
How cinchonine is actually used
Cinchonine is a technical term confined to chemistry, pharmacology, and history of medicine; it is never used in everyday conversation. As an uncountable substance noun, it normally appears without an article except when referring to a specific sample or preparation.
Easily confused with cinchonine
Cinchonidine is the stereoisomer of cinchonine — same molecular formula but different spatial arrangement and different optical rotation.
Quinine is a related but distinct cinchona alkaloid with a methoxy group that cinchonine lacks; quinine is the famous antimalarial, while cinchonine has weaker medicinal use.