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