ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/H2N2O2.2Na/c3-1-2-4%3B%3B/h%28H%2C1%2C4%29%28H%2C2%2C3%29%3B%3B/q%3B2%2A%2B1/p-2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/H2N2O2.2Na/c3-1-2-4%3B%3B/h%28H%2C1%2C4%29%28H%2C2%2C3%29%3B%3B/q%3B2%2A%2B1/p-2 could not be loaded.