ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DCCC1%3DC%28C%3DCC2%3DC1OC%28%3DO%29C%3DC2%29OC%29C/file?format=sdf&get3d=True  -- CC%28%3DCCC1%3DC%28C%3DCC2%3DC1OC%28%3DO%29C%3DC2%29OC%29C could not be loaded.