2,3,5,6-Tetramethyl-1,4-benzoquinone 2,3,5,6-Tetramethyl-p-benzoquinone 2,3,5,6-Tetramethylbenzoquinone 2,5-Cyclohexadiene-1,4-dione, 2,3,5,6-tetramethyl- 527-17-3 Duroquinone NSC2068 Tetramethyl-1,4-benzoquinone Tetramethyl-p-benzoquinone Tetramethylquinone p-Benzoquinone, 2,3,5,6-tetramethyl-