ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12OC%28%3DO%29C%3DC1C%28C%29%28C%29CC%3DC2/file?format=sdf&get3d=True  -- CC12OC%28%3DO%29C%3DC1C%28C%29%28C%29CC%3DC2 could not be loaded.