Ovalene
Ovalene is a polycyclic aromatic hydrocarbon with the formula CH, which consists of ten peri-fused six-membered rings. It is very similar to coronene. Ovalene is a reddish-orange compound. It is sparingly soluble in solvents such as benzene, toluene, and dichloromethane. Its solutions have a green fluorescence under UV light. Ovalene has been shown to form in deep-sea hydrothermal vent areas and in the hydrocracking process of petroleum refining.