quinoxaline

quinoxaline [kwi-nok-suh-leen, -lin] Word Origin noun Chemistry.

1. a colorless, crystalline, water-soluble powder, C8H6N2, used chiefly in organic synthesis.

Also quin·ox·a·lin [kwi-nok-suh-lin] /kwɪˈnɒk sə lɪn/. Origin of quinoxaline 1880–85; quin(ine) + (gly)oxal + -ine2