ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/Li.Nb.3O/q%2B1%3B%2B5%3B3%2A-2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/Li.Nb.3O/q%2B1%3B%2B5%3B3%2A-2 could not be loaded.