ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8Cl4N2/c9-5-3%281-13%296%2810%298%2812%297%2811%294%285%292-14/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C8Cl4N2/c9-5-3%281-13%296%2810%298%2812%297%2811%294%285%292-14 could not be loaded.