ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C12H4Cl4O2/c13-5-1-9-10%282-6%285%2914%2918-12-4-8%2816%297%2815%293-11%2812%2917-9/h1-4H/file?format=sdf&get3d=True -- InChI%3DInChI%26%2361%3B1S/C12H4Cl4O2/c13-5-1-9-10%282-6%285%2914%2918-12-4-8%2816%297%2815%293-11%2812%2917-9/h1-4H could not be loaded.