Glyoxaline /(?)/

Gly·ox·a·line

Glyoxaline

n.
  1. A white, crystalline, organic base, C3H4N2, produced by the action of ammonia on glyoxal, and forming the origin of a large class of derivatives hence, any one of the series of which glyoxaline is a type; -- called also oxaline. (Chem.)