ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC3c4ccccc4S/C3%3DC2/Sc1ccccc1C2%3DO/file?format=sdf&get3d=True  -- O%3DC3c4ccccc4S/C3%3DC2/Sc1ccccc1C2%3DO could not be loaded.