ERROR opening https://cactus.nci.nih.gov/chemical/structure/SC1%3DC2C%28C%3DCC%3DC2%29%3DC%28S%29C3%3DCC%3DCC%3DC31/file?format=sdf&get3d=True -- SC1%3DC2C%28C%3DCC%3DC2%29%3DC%28S%29C3%3DCC%3DCC%3DC31 could not be loaded.