ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C12H8Cl6O/c13-8-9(14)11(16)5-3-1-2(6-7(3)19-6)4(5)10(8,15)12(11,17)18/h2-7H,1H2/t2-,3 ,4 ,5-,6-,7 ,10 ,11-/file?format=sdf&get3d=True  -- InChI=1S/C12H8Cl6O/c13-8-9(14)11(16)5-3-1-2(6-7(3)19-6)4(5)10(8,15)12(11,17)18/h2-7H,1H2/t2-,3 ,4 ,5-,6-,7 ,10 ,11- could not be loaded.