ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8H/c1-3-5-7-8-6-4-2/h1H/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C8H/c1-3-5-7-8-6-4-2/h1H could not be loaded.