ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/CN4O8/c6-2%287%291%283%288%299%2C4%2810%2911%295%2812%2913/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/CN4O8/c6-2%287%291%283%288%299%2C4%2810%2911%295%2812%2913 could not be loaded.