ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H10/c1-3-5-6-4-2/h3%2C5H2%2C1-2H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H10/c1-3-5-6-4-2/h3%2C5H2%2C1-2H3 could not be loaded.