ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DC%28C%3DC2C3CC4%3DC%28CN3CCC2%3DC1%29C%28%3DC%28C%3DC4%29O%29OC%29O/file?format=sdf&get3d=True  -- COC1%3DC%28C%3DC2C3CC4%3DC%28CN3CCC2%3DC1%29C%28%3DC%28C%3DC4%29O%29OC%29O could not be loaded.