ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC2c3c%28OC%28c1ccccc1%29C2%29cc%28O%29cc3O/file?format=sdf&get3d=True  -- O%3DC2c3c%28OC%28c1ccccc1%29C2%29cc%28O%29cc3O could not be loaded.