rubidine

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

• noun (Chem.) A nitrogenous base homologous with pyridine, obtained from coal tar as an oily liquid, C11H17N; also, any one of the group od metameric compounds of which rubidine is the type.

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

• noun organic chemistry A nitrogenous base homologous with pyridine, obtained from coal tar as an oily liquid, C11H17N.
• noun organic chemistry Any metameric compound in the same group as the above.