Prehnitene
Prehnitene or 1,2,3,4-tetramethylbenzene is an organic compound with the formula C6H24, classified as an aromatic hydrocarbon. It is a flammable colorless liquid which is nearly insoluble in water but soluble in organic solvents. It occurs naturally in coal tar. Prehnitene is one of three isomers of tetramethylbenzene, the other two being isodurene and durene. It is a relatively easily oxidized benzene derivative, with E1/2 of 2.0 V vs NHE.