The cymenes (methylcumenes, isopropyltoluenes) constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with an isopropyl group (–CH(CH3)2), and a methyl group (–CH3) as a substituent. Through their different arrangement, they form three structural isomers with the molecular formula C10H14. They also belong to the group of C4-benzenes. The best-known isomer is the p-Cymene, it occurs in nature and is one of the terpenes.
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Cymenes Wikipedia(Text) CC BY-SA