ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H12O2/c7-5-3-1-2-4-6%285%298/h5-8H%2C1-4H2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H12O2/c7-5-3-1-2-4-6%285%298/h5-8H%2C1-4H2 could not be loaded.