ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C6H8N2O/c7-4-1-2-6%289%295%288%293-4/h1-3%2C9H%2C7-8H2/file?format=sdf&get3d=True -- InChI%3DInChI%26%2361%3B1S/C6H8N2O/c7-4-1-2-6%289%295%288%293-4/h1-3%2C9H%2C7-8H2 could not be loaded.