ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28C%29%28C%29%28C%29C1%3DC%28C%28%3DCC%28%3DC1%29CC1%28CCCC1%29CO%29C%28C%29%28C%29C%29O/file?format=sdf&get3d=True  -- C%28C%29%28C%29%28C%29C1%3DC%28C%28%3DCC%28%3DC1%29CC1%28CCCC1%29CO%29C%28C%29%28C%29C%29O could not be loaded.