ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC1%3DC%28OC2%3DC%28Cl%29C%3DC%28Cl%29C%3DC2%29C%3DCC%28Cl%29%3DC1/file?format=sdf&get3d=True -- OC1%3DC%28OC2%3DC%28Cl%29C%3DC%28Cl%29C%3DC2%29C%3DCC%28Cl%29%3DC1 could not be loaded.