ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28CCCCCCC/C%3DC%5CC%3DC%5CC%3DC%5CC%28O%29C%28O%29CC%29%3DO/file?format=sdf&get3d=True  -- OC%28CCCCCCC/C%3DC%5CC%3DC%5CC%3DC%5CC%28O%29C%28O%29CC%29%3DO could not be loaded.