ERROR opening https://cactus.nci.nih.gov/chemical/structure/1/C6H5NO2/c8-6%289%295-2-1-3-7-4-5/h1-4H%2C%20%28H%2C8%2C9%29/file?format=sdf&get3d=True  -- 1/C6H5NO2/c8-6%289%295-2-1-3-7-4-5/h1-4H%2C%20%28H%2C8%2C9%29 could not be loaded.