ERROR opening https://cactus.nci.nih.gov/chemical/structure/BrC%3D1C%3DCC2%3DC%28C1%29NC%28S%29%3DC2CCN/file?format=sdf&get3d=True  -- BrC%3D1C%3DCC2%3DC%28C1%29NC%28S%29%3DC2CCN could not be loaded.