ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C2H8N2.2HI/c3-1-2-4%3B%3B/h1-4H2%3B2%2A1H/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C2H8N2.2HI/c3-1-2-4%3B%3B/h1-4H2%3B2%2A1H could not be loaded.