If this be quinidine, it will be dissolved on the addition of proportionately more ether, while cinchonine will remain unaffected.
quinidine yields with chromic acid the same decomposition products as quinine.
Dr de Vrij, for instance, found sometimes more than 20% of quinidine in some samples of quinoidine of commerce.
This reaction is not characteristic of quinine, for with quinidine one gets the same reaction.
From the above statement respecting the solubility of quinidine in ether, it appears that the 10 gr.
It is nothing more than quinidine, or cinchonidine, or a mixture of both.
quinidine quin·i·dine (kwĭn'ĭ-dēn')
A colorless crystalline alkaloid that is a stereoisomer of quinine and is used as a treatment for malaria and cardiac arrhythmias.