ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C12H18/c1-7-8%282%2910%284%2912%286%2911%285%299%287%293/h1-6H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C12H18/c1-7-8%282%2910%284%2912%286%2911%285%299%287%293/h1-6H3 could not be loaded.