ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H6N2O/c7-6%289%295-2-1-3-8-4-5/h1-4H%2C%28H2%2C7%2C9%29/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C6H6N2O/c7-6%289%295-2-1-3-8-4-5/h1-4H%2C%28H2%2C7%2C9%29 could not be loaded.