ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C6H11N3/c1-6(2,3)4-5-8-9-7/h4-5H,1-3H3/file?format=sdf&get3d=True  -- InChI=1/C6H11N3/c1-6(2,3)4-5-8-9-7/h4-5H,1-3H3 could not be loaded.