ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C2H4Cl4P2/c3-7(4)1-2-8(5)6/h1-2H2/file?format=sdf&get3d=True -- InChI=1S/C2H4Cl4P2/c3-7(4)1-2-8(5)6/h1-2H2 could not be loaded.