ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6Cl6/c7-1-2(8)4(10)6(12)5(11)3(1)9/file?format=sdf&get3d=True  -- InChI=1S/C6Cl6/c7-1-2(8)4(10)6(12)5(11)3(1)9 could not be loaded.