{HEAD ~ A useful fluorescent orange dye} is {TAIL ~ 14H anthrathioxanthene} 14 one, commercially available as C.I. Solvent Orange 63 from Hoescht Celanese, and having the following chemical structure: 
{ HEAD ~ A useful fluorescent orange dye } is { TAIL ~ 14H anthrathioxanthene } 14 one , commercially available as C.I. Solvent Orange 63 from Hoescht Celanese , and having the following chemical structure :
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