cinchonine's Usage Examples:

These relations are shown by the formulae: - cinchonine C19H21N2.

The other alkaloids of cinchona bark - quinidine, cinchonidine, and cinchonine - also possess similar properties, but all are much less effective than quinine.

But the forests of Huanuco and Huamalios abound in species yielding the grey bark of commerce, which is rich in cinchonine, an alkaloid efficacious as a febrifuge, though inferior to quinine.

It is a decomposition product of various alkaloids (nicotine, sparteine, cinchonine, 'c.

A mixture of the cinchona alkaloids, consisting principally of cinchonidine sulphate, with smaller quantities of the sulphates of quinine and cinchonine, is sold under the name of "quinetum" at a cheaper rate than quinine.

This permits the writing of cinchonine, for example, as C,H6N CioH15(OH)N, the hydroxy group being in the part CioH15(OH)N, about which the constitution is uncertain.

The other alkaloids are distinguished from quinine thus: quinidine resembles quinine, but is dextro-rotatory, and the iodide is very insoluble in water; the solution of cinchonidine, which is laevo-rotatory, does not give the thalleoquin test, nor fluorescence; cinchonine resembles cinchonidine in these respects, but is dextrorotatory.

Mesotartaric acid is formed when cinchonine tartrate is heated for some time at 170° C.

In 1820 Pelletier and Caventou proved that the cinchonino of Gomez contained two alkaloids, which they named quinine and cinchonine.

The sulphate of quinine used in medicine may contain up to 3% of cinchonidine, but should be free from cinchonine, quinidine and cupreine.