ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C5H12N2/c1-7-4-2-6-3-5-7/h6H,2-5H2,1H3/file?format=sdf&get3d=True  -- InChI=1S/C5H12N2/c1-7-4-2-6-3-5-7/h6H,2-5H2,1H3 could not be loaded.