ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C4H7N3O/c1-7-2-3%288%296-4%287%295/h2%2C8H%2C1H3%2C%28H2%2C5%2C6%29/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C4H7N3O/c1-7-2-3%288%296-4%287%295/h2%2C8H%2C1H3%2C%28H2%2C5%2C6%29 could not be loaded.