ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C6H8N2O2/c9-6-4-1-2-7-3-5%284%2910-8-6/h7H%2C1-3H2%2C%28H%2C8%2C9%29/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C6H8N2O2/c9-6-4-1-2-7-3-5%284%2910-8-6/h7H%2C1-3H2%2C%28H%2C8%2C9%29 could not be loaded.