ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC%28%3DO%29NC1%3DC%28C%3DC%28C%28%3DC1I%29CC%28CC%29C%28%3DO%29O%29I%29I/file?format=sdf&get3d=True  -- CCCC%28%3DO%29NC1%3DC%28C%3DC%28C%28%3DC1I%29CC%28CC%29C%28%3DO%29O%29I%29I could not be loaded.