ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C16H12O4/c1-19-11-7-12%2817%2916-13%2818%299-14%2820-15%2816%298-11%2910-5-3-2-4-6-10/h2-9%2C17H%2C1H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C16H12O4/c1-19-11-7-12%2817%2916-13%2818%299-14%2820-15%2816%298-11%2910-5-3-2-4-6-10/h2-9%2C17H%2C1H3 could not be loaded.