ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H2Cl8/c5-1(6)3(9,10)4(11,12)2(7)8/h1-2H/file?format=sdf&get3d=True  -- InChI=1S/C4H2Cl8/c5-1(6)3(9,10)4(11,12)2(7)8/h1-2H could not be loaded.