ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28N%29%28CC1%3DCC%28O%29%3DC%28O%29C%3DC1%29C%28O%29%3DO/file?format=sdf&get3d=True  -- CC%28N%29%28CC1%3DCC%28O%29%3DC%28O%29C%3DC1%29C%28O%29%3DO could not be loaded.