ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C7H4Cl2O/c8-6-4-2-1-3-5(6)7(9)10/h1-4H/file?format=sdf&get3d=True  -- InChI=1S/C7H4Cl2O/c8-6-4-2-1-3-5(6)7(9)10/h1-4H could not be loaded.