2,3-Dichloro-5,6-dicyano-1,4-benzoquinone
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (or DDQ) is the chemical reagent with formula C6Cl2(CN)2O2. This oxidant is useful for the dehydrogenation of alcohols, phenols, and steroid ketones.
Source: Wikipedia — 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (CC BY-SA 4.0)