ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DC%28C%28%3DC%28C%3DC1CC%28C%29N%29OC%29Br%29OC/file?format=sdf&get3d=True  -- C1%3DC%28C%28%3DC%28C%3DC1CC%28C%29N%29OC%29Br%29OC could not be loaded.