ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H8N2/c9-6-3-5-8-4-1-2-7-10-8/h1-2,4,7H,3,5H2/file?format=sdf&get3d=True  -- InChI=1S/C8H8N2/c9-6-3-5-8-4-1-2-7-10-8/h1-2,4,7H,3,5H2 could not be loaded.