ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/4CN.Ba.Pt/c4%2A1-2%3B%3B/q4%2A-1%3B2%2A%2B2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/4CN.Ba.Pt/c4%2A1-2%3B%3B/q4%2A-1%3B2%2A%2B2 could not be loaded.