1,4-benzenedicarbonitrile, 2,5-dichloro-3,6-dihydroxy- 2,5-dichloro-3,6-dihydroxyterephthalonitrile InChI=1/C8H2Cl2N2O2/c9-5-3(1-11)7(13)6(10)4(2-12)8(5)14/h13-14