ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC1%3DCC%3DC%28C%3DC1%29C1%28C%28%3DO%29NC2%3DC1C%3DCC%3DC2%29C1%3DCC%3DC%28O%29C%3DC1/file?format=sdf&get3d=True  -- OC1%3DCC%3DC%28C%3DC1%29C1%28C%28%3DO%29NC2%3DC1C%3DCC%3DC2%29C1%3DCC%3DC%28O%29C%3DC1 could not be loaded.