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![Benz[a]anthracene Phenalene Polycyclic aromatic hydrocarbon Chemistry, Molecule illustration transparent background PNG clipart thumbnail](https://p7.hiclipart.com/preview/965/286/397/benz-a-anthracene-phenalene-polycyclic-aromatic-hydrocarbon-chemistry-molecule-illustration-thumbnail.jpg "Benz[a]anthracene Phenalene Polycyclic aromatic hydrocarbon Chemistry, Molecule illustration transparent background PNG clipart")
