Lucigenin
Lucigenin is an aromatic compound used in areas which include chemiluminescence. Its chemical name is bis-N-methylacridinium nitrate. It exhibits a bluish-green fluorescence. It is used as a probe for superoxide anion in biology, for its chemiluminescent properties. Synthesis

It may be prepared from acridone. There's also a route from toluene:

Nitrates
Acridines
Quaternary ammonium compounds