ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H8N2O2/c9-5-6-4-8(12-10-6)7-2-1-3-11-7/h1-4H,5,9H2/file?format=sdf&get3d=True  -- InChI=1S/C8H8N2O2/c9-5-6-4-8(12-10-6)7-2-1-3-11-7/h1-4H,5,9H2 could not be loaded.