1,4-cyclohexadiene-1,4-dicarbonitrile, 2,5-dichloro-3,6-dioxo- 2,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,4-dicarbonitrile InChI=1/C8Cl2N2O2/c9-5-3(1-11)7(13)6(10)4(2-12)8(5)1