ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1CC%28%3DO%29C%3DC2C1%28CC%28CC2%29C%28%3DC%29C%29C/file?format=sdf&get3d=True -- CC1CC%28%3DO%29C%3DC2C1%28CC%28CC2%29C%28%3DC%29C%29C could not be loaded.