ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H3N7/c1-7-4-9-2-11-6-12-3-10-5(8-1)13(4)6/h1-3H/file?format=sdf&get3d=True  -- InChI=1S/C6H3N7/c1-7-4-9-2-11-6-12-3-10-5(8-1)13(4)6/h1-3H could not be loaded.