ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H14N2O/c9-6-5-8-3-1-7-2-4-8/h7,9H,1-6H2/file?format=sdf&get3d=True  -- InChI=1S/C6H14N2O/c9-6-5-8-3-1-7-2-4-8/h7,9H,1-6H2 could not be loaded.