2,5-Cyclohexadiene-1,4-dione, 2,5-dimethoxy- 2,5-Dimethoxy-1,4-benzoquinone 2,5-Dimethoxy-p-benzoquinone 2,5-Dimethoxybenzoquinone 3117-03-1 NSC509720 p-Benzoquinone, 2,5-dimethoxy-