ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C3H5N3/c1-3-4-2-5-6-3/h2H,1H3,(H,4,5,6)/file?format=sdf&get3d=True  -- InChI=1S/C3H5N3/c1-3-4-2-5-6-3/h2H,1H3,(H,4,5,6) could not be loaded.