ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%5C1c3c%28OC%29c%28OC%29ccc3O/C%28%3DC/1%29c2c%28OC%29cccc2OC/file?format=sdf&get3d=True  -- O%3DC%5C1c3c%28OC%29c%28OC%29ccc3O/C%28%3DC/1%29c2c%28OC%29cccc2OC could not be loaded.