ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H3N3O7.H3N/c10-6-4%288%2813%2914%291-3%287%2811%2912%292-5%286%299%2815%2916%3B/h1-2%2C10H%3B1H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H3N3O7.H3N/c10-6-4%288%2813%2914%291-3%287%2811%2912%292-5%286%299%2815%2916%3B/h1-2%2C10H%3B1H3 could not be loaded.