ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H2N4O6/c13-7-8(14)10-4-2-6(12(17)18)5(11(15)16)1-3(4)9-7/h1-2H/file?format=sdf&get3d=True -- InChI=1S/C8H2N4O6/c13-7-8(14)10-4-2-6(12(17)18)5(11(15)16)1-3(4)9-7/h1-2H could not be loaded.