ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C12H6Cl4/c13-9-3-1-7(5-11(9)15)8-2-4-10(14)12(16)6-8/h1-6H/file?format=sdf&get3d=True  -- InChI=1S/C12H6Cl4/c13-9-3-1-7(5-11(9)15)8-2-4-10(14)12(16)6-8/h1-6H could not be loaded.