ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DCCC1%3DC%28C2%3DC%28C%3DC1O%29OC%28%3DCC2%3DO%29C3%3DCC%28%3DC%28C%3DC3%29O%29OC%29O%29C/file?format=sdf&get3d=True  -- CC%28%3DCCC1%3DC%28C2%3DC%28C%3DC1O%29OC%28%3DCC2%3DO%29C3%3DCC%28%3DC%28C%3DC3%29O%29OC%29O%29C could not be loaded.