ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C5H4N4O/c10-5-3-4%287-1-6-3%298-2-9-5/h1-2H%2C%28H2%2C6%2C7%2C8%2C9%2C10%29/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C5H4N4O/c10-5-3-4%287-1-6-3%298-2-9-5/h1-2H%2C%28H2%2C6%2C7%2C8%2C9%2C10%29 could not be loaded.