ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H9N3O3/c1-5-7-4-6%289%2811%2912%298%285%292-3-10/h4%2C10H%2C2-3H2%2C1H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H9N3O3/c1-5-7-4-6%289%2811%2912%298%285%292-3-10/h4%2C10H%2C2-3H2%2C1H3 could not be loaded.