ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C20H12N2O4/c23-19%2824%2913-9-17%2821-15-7-3-1-5-11%2813%2915%2918-10-14%2820%2825%2926%2912-6-2-4-8-16%2812%2922-18/h1-10H%2C%28H%2C23%2C24%29%28H%2C25%2C26%29/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C20H12N2O4/c23-19%2824%2913-9-17%2821-15-7-3-1-5-11%2813%2915%2918-10-14%2820%2825%2926%2912-6-2-4-8-16%2812%2922-18/h1-10H%2C%28H%2C23%2C24%29%28H%2C25%2C26%29 could not be loaded.