ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%3DC%28C%29C%3DC1%29%3DC1SC2%3DC%28N3CCNCC3%29C%3DCC%3DC2/file?format=sdf&get3d=True  -- CC%28C%3DC%28C%29C%3DC1%29%3DC1SC2%3DC%28N3CCNCC3%29C%3DCC%3DC2 could not be loaded.