ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6O6/c7-3-1-2%285%289%2911-3%296%2810%2912-4%281%298/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6O6/c7-3-1-2%285%289%2911-3%296%2810%2912-4%281%298 could not be loaded.