ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H15N/c1-5%282%297-6%283%294/h5-7H%2C1-4H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H15N/c1-5%282%297-6%283%294/h5-7H%2C1-4H3 could not be loaded.