ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28CC1%3DC%28C%28%3DC%28C%3DC1I%29I%29N%29I%29C%28%3DO%29O/file?format=sdf&get3d=True  -- CCC%28CC1%3DC%28C%28%3DC%28C%3DC1I%29I%29N%29I%29C%28%3DO%29O could not be loaded.