ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C16H12O6/c1-21-10-6-11%2818%2913-12%287-10%2922-16%2815%2820%2914%2813%2919%298-2-4-9%2817%295-3-8/h2-7%2C17-18%2C20H%2C1H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C16H12O6/c1-21-10-6-11%2818%2913-12%287-10%2922-16%2815%2820%2914%2813%2919%298-2-4-9%2817%295-3-8/h2-7%2C17-18%2C20H%2C1H3 could not be loaded.