ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28CC%28%3DO%29O%29C%28%3DN%29NP%28%3DO%29%28O%29O/file?format=sdf&get3d=True  -- CN%28CC%28%3DO%29O%29C%28%3DN%29NP%28%3DO%29%28O%29O could not be loaded.