ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28c%28cc%28cc1OC%29%5CC%3DC%5CCO%29OC%29O/file?format=sdf&get3d=True  -- c1%28c%28cc%28cc1OC%29%5CC%3DC%5CCO%29OC%29O could not be loaded.