ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN%28CCC%29S%28%3DO%29%28%3DO%29C1%3DCC%3DC%28C%3DC1%29C%28%3DO%29O/file?format=sdf&get3d=True  -- CCCN%28CCC%29S%28%3DO%29%28%3DO%29C1%3DCC%3DC%28C%3DC1%29C%28%3DO%29O could not be loaded.