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