ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C7H6Cl2/c8-7(9)6-4-2-1-3-5-6/h1-5,7H/file?format=sdf&get3d=True  -- InChI=1S/C7H6Cl2/c8-7(9)6-4-2-1-3-5-6/h1-5,7H could not be loaded.