ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H14/c1-5%282%296%283%294/h5-6H%2C1-4H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H14/c1-5%282%296%283%294/h5-6H%2C1-4H3 could not be loaded.