chinoidine

from The Century Dictionary.

• noun An amorphous dark-brown brittle substance, obtained in the manufacture of quinine by precipitating the brown mother-liquors with ammonia, and consisting chiefly of the remaining amorphous alkaloids. It is used as a substitute for quinine.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) See quinodine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative form of quinoidine.