ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DC%28C%28%3DO%29C%28%3DCN1CC%28CO%29O%29I%29I/file?format=sdf&get3d=True  -- C1%3DC%28C%28%3DO%29C%28%3DCN1CC%28CO%29O%29I%29I could not be loaded.