ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%3DC.C%3DC.C%3DC.C%3DC.%5BCl-%5D.%5BCl-%5D.%5BRh%5D.%5BRh%5D/file?format=sdf&get3d=True  -- C%3DC.C%3DC.C%3DC.C%3DC.%5BCl-%5D.%5BCl-%5D.%5BRh%5D.%5BRh%5D could not be loaded.