ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%28C%28CC1%29C%28C%29C%29C2%3DC%28C%28%3DC%28C%3DC2O%29O%29C%28%3DO%29CCC3%3DCC%3DCC%3DC3%29O/file?format=sdf&get3d=True -- CC1%3DCC%28C%28CC1%29C%28C%29C%29C2%3DC%28C%28%3DC%28C%3DC2O%29O%29C%28%3DO%29CCC3%3DCC%3DCC%3DC3%29O could not be loaded.