ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28C%29N1C%28%3DO%29C%28%3DC%28NC1%3DO%29C%29Br/file?format=sdf&get3d=True  -- CCC%28C%29N1C%28%3DO%29C%28%3DC%28NC1%3DO%29C%29Br could not be loaded.